I have completed a thorough analysis based on the proportion of the total population that is each personality type (assuming that these personality types and their distributions aren't culturally bound), the leaders of the group, and the personality traits of the group. I obtained the highly valid and reliable information about the proportions of the population who are each personality type here and the descriptions of each personality type here.
Additionally, I assume that each of these types has been isolated from other types for a long time and that a Hunger Games style situation is forcing these groups to fight each other. For convenience, I assume that the amount of landmass occupied by each group is proportional to the amount of people in the group. For fun/also convenience, I assigned these groups to areas currently occupied by existing countries/dependencies in order of this list on Wikipedia.
Allow me to start by introducing each of the groups:
The ISFJ (comprising 13.8% of the total population and located in Russia) are led by Gandhi, Brad Pitt, David Beckham, Mulan, and Legolas. It is also led by a guy named High Hackman, but we aren't sure who he is because no Google search, Facebook search, or LinkedIn search gives us any information about his identity. Perhaps he is no one, but given his leadership status I think he is, in fact, a man of the shadows whose anonymity is his strength. Members of this group have been described thus: "Quiet, friendly, responsible, and conscientious. Committed and steady in meeting their obligations. Thorough, painstaking, and accurate. Loyal, considerate, notice and remember specifics about people who are important to them, concerned with how others feel. Strive to create an orderly and harmonious environment at work and at home".
The ESFJ (comprising 12.3% of the total population and located in Antarctica) are led by Barack and Michelle Obama, Ryan Reynolds, Mr. Rogers, Reese Witherspoon, John Bytheway, and Julia Roberts. Members of this group have been described thus: "Warmhearted, conscientious, and cooperative. Want harmony in their environment, work with determination to establish it. Like to work with others to complete tasks accurately and on time. Loyal, follow through even in small matters. Notice what others need in their day-by-day lives and try to provide it. Want to be appreciated for who they are and for what they contribute."
The ISTJ (comprising 11.6% of the population and located in Canada) are led by George Washington, Ron Paul, Hillary Clinton, Arnold Schwarzenegger, Steve Young, and Dan Brown. Additionally, the Board's own Mitty is part of this group. Members of the ISTJ have been described thus: "Quiet, serious, earn success by thoroughness and dependability. Practical, matter-of-fact, realistic, and responsible. Decide logically what should be done and work toward it steadily, regardless of distractions. Take pleasure in making everything orderly and organized - their work, their home, their life. Value traditions and loyalty."
The ISFP (comprising 8.8% of the population and located in China) are led by Martin Luther King Jr., Nelson Mandela, Usher, T-Swift, Justin Timberlake, and Beyoncé. Members of this group have been described thus: "Quiet, friendly, sensitive, and kind. Enjoy the present moment, what's going on around them. Like to have their own space and to work within their own time frame. Loyal and committed to their values and to people who are important to them. Dislike disagreements and conflicts, do not force their opinions or values on others.
The ESTJ (comprising 8.7% of the population and located in the United States) are led by Dwayne The Rock Johnson, Pierce Brosnan, Gaston from Beauty and the Beast, Hulk Hogan, Dr. Phil, and Kirk Kerkorian. Members of this group have been described thus: "Practical, realistic, matter-of-fact. Decisive, quickly move to implement decisions. Organize projects and people to get things done, focus on getting results in the most efficient way possible. Take care of routine details. Have a clear set of logical standards, systematically follow them and want others to also. Forceful in implementing their plans."
The ESFP (comprising 8.5% of the population and located in Brazil) are led by Donny Osmond, Justin Bieber, Mariah Carey, Will Smith, Penelope Cruz, and Adam Sandler. Members of this group have been described thus: "Outgoing, friendly, and accepting. Exuberant lovers of life, people, and material comforts. Enjoy working with others to make things happen. Bring common sense and a realistic approach to their work, and make work fun. Flexible and spontaneous, adapt readily to new people and environments. Learn best by trying a new skill with other people."
The ENFP (comprising 8.1% of the population and located in Australia) are led by Freddy Mercury, Ellen Degeneres, Roger Stone, Glenn Beck, and Gene Wilder. Additionally, Alta and Tipperary are part of this group. Members of the ENFP have been described thus: "Warmly enthusiastic and imaginative. See life as full of possibilities. Make connections between events and information very quickly, and confidently proceed based on the patterns they see. Want a lot of affirmation from others, and readily give appreciation and support. Spontaneous and flexible, often rely on their ability to improvise and their verbal fluency."
The ISTP (comprising 5.4% of the population and located in India) are led by Genghis Khan, Mark Zuckerburg, Dwight Eisenhower, Bruce Willis, Han Solo, and Indiana Jones. Members of this group have been described thus: "Tolerant and flexible, quiet observers until a problem appears, then act quickly to find workable solutions. Analyze what makes things work and readily get through large amounts of data to isolate the core of practical problems. Interested in cause and effect, organize facts using logical principles, value efficiency."
The INFP (comprising 4.4% of the population and located in Argentina) are led by Beethoven, Luna Lovegood, Lisa Simpson, John Lennon, Edgar Allan Poe, and Stephanie Meyer. Additionally, Van Goff and Sherpa Dave are members of this group. Members of the INFP have been described thus: "Idealistic, loyal to their values and to people who are important to them. Want an external life that is congruent with their values. Curious, quick to see possibilities, can be catalysts for implementing ideas. Seek to understand people and to help them fulfill their potential. Adaptable, flexible, and accepting unless a value is threatened."
The ESTP (comprising 4.3% of the population and located in Kazakhstan) are led by Tyra Banks, Cenk Uyghur, President Monson, Rush Limbaugh, Oprah, Sinbad, and Babe Ruth. Members of this group have been described thus: "Flexible and tolerant, they take a pragmatic approach focused on immediate results. Theories and conceptual explanations bore them - they want to act energetically to solve the problem. Focus on the here-and-now, spontaneous, enjoy each moment that they can be active with others. Enjoy material comforts and style. Learn best through doing."
The ENFJ (comprising 2.5% of the population and located in Algeria) are led by Jim Carey, Ben Stiller, Kermit the Frog, Buggs Bunny, Robert Downey Jr., and Tina Fey. Additionally, I, Sheebs, identify as a member of this group, as does Anathema. Members of the ENFJ have been described thus: "Warm, empathetic, responsive, and responsible. Highly attuned to the emotions, needs, and motivations of others. Find potential in everyone, want to help others fulfill their potential. May act as catalysts for individual and group growth. Loyal, responsive to praise and criticism. Sociable, facilitate others in a group, and provide inspiring leadership."
The INTJ (comprising 2.1% of the population and located in the Democratic Republic of the Congo) are led by Gandalf, Dumbledore, Professor X, Leonardo da Vinci, Aristotle, Captain Picard, and Tesla. Additionally, The Entomophagist is a member of this group. Members of the INTJ have been described thus: "Have original minds and great drive for implementing their ideas and achieving their goals. Quickly see patterns in external events and develop long-range explanatory perspectives. When committed, organize a job and carry it through. Skeptical and independent, have high standards of competence and performance - for themselves and others."
The INTP (comprising 3.3% of the population and located in Greenland) are led by Einstein, Plato, Ayn Rand, Steve Jobs, Bill Gates, and L. Ron Hubbard. Members of the INTP have been described thus: "Seek to develop logical explanations for everything that interests them. Theoretical and abstract, interested more in ideas than in social interaction. Quiet, contained, flexible, and adaptable. Have unusual ability to focus in depth to solve problems in their area of interest. Skeptical, sometimes critical, always analytical."
The ENTP (comprising 3.2% of the population and located in Saudi Arabia) are led by Napoleon, Theodore Roosevelt, Benjamin Franklin, President Hinckley, Alex Jones, Jay Leno, and Jamie Lee Curtis. They have been described thus: "Quick, ingenious, stimulating, alert, and outspoken. Resourceful in solving new and challenging problems. Adept at generating conceptual possibilities and then analyzing them strategically. Good at reading other people. Bored by routine, will seldom do the same thing the same way, apt to turn to one new interest after another."
The ENTJ (comprising 1.8% of the population and located in Mexico) are led by Conan O’Brien, David O. Mckay, David Letterman, Mitt Romney, Bill Bradley, and Rachel Maddow. They have been described thus: "Frank, decisive, assume leadership readily. Quickly see illogical and inefficient procedures and policies, develop and implement comprehensive systems to solve organizational problems. Enjoy long-term planning and goal setting. Usually well informed, well read, enjoy expanding their knowledge and passing it on to others. Forceful in presenting their ideas."
The INFJ (comprising 1.5% of the population and located in Indonesia) are led by Obi-Wan Kenobi, Thomas Jefferson, Captain Jack Sparrow, Lady Gaga, and Brandon Flowers. Additionally, the guppy of doom is a member of this group. Members of the INFJ have been described thus: "Seek meaning and connection in ideas, relationships, and material possessions. Want to understand what motivates people and are insightful about others. Conscientious and committed to their firm values. Develop a clear vision about how best to serve the common good. Organized and decisive in implementing their vision.
Here is what happens initially:
The ISFJ, under the leadership of Gandhi, Brad Pitt, David Beckham, Mulan, Legolas, and Hugh Hickman, are responsible and conscientious enough to know that winter is coming and that Russia is not the place to be. Seeing as Europe is largely uninhabited, they use the existing infrastructure to get as many people as possible as far west into Europe as they are able. Those who are left behind subsist on what they can harvest and existing stored food. Legolas and his elf ISFJs teach as many people as possible their fighting techniques behind Gandhi's back and go to southern Russia to start a new Mirkwood. They do not wish to go to war but want to be prepared.
The ESFJ, who inhabit the Antarctic Peninsula because everywhere else in Antarctica is terrible, are having tremendous difficulties surviving in their inhospitable land. There is little existing infrastructure. The 900 million-strong group must subsist on seals and penguins at temperatures just below freezing as it is the springtime in the southern hemisphere. However, they obviously can't. The nearest continent is 800 km away. Unfortunately, they all do not make it despite the inspiring leadership of the Obamas, Ryan Reynolds, Mr. Rogers, Reese Witherspoon, John Bytheway, and Julia Roberts.
Under the direction of George Washington, Ron Paul, Hillary Clinton, Arnold Schwarzenegger, Steve Young, Dan Brown, and Mitty, the ISTJ, located in Canada, harvests what it can along the border with the US. They immediately invade the lands of the ESTJ in the US, which is easy to do because the ESTJ are led by Dwayne The Rock Johnson, Pierce Brosnan, Gaston from Beauty and the Beast, Hulk Hogan, Dr. Phil, and Kirk Kerkorian. Kirk Kerkorian, the only one with relevant skills, does his best but had tremendous interpersonal difficulty with Gaston, Hulk Hogan, and Dr. Phil. The Rock and Pierce Brosnan did what they could to help but they were not terribly helpful. After a few days, Gaston kills all of his fellow leaders in a fit of narcissistic rage. The ESTJ turn on Gaston. The weakened ESTJ succumb to the ISTJ almost immediately.
The ISFP over in China, led by Martin Luther King Jr., Nelson Mandela, Usher, T-Swift, Justin Timberlake, and Beyoncé, by nature dislike disagreement and conflicts. Grateful that no one else is nearby, they harvest, prepare for the winter, and try to live regular lives the best they can. As this whole situation is very Western-biased and Westerners are in charge, this is a bothersome situation for many people who are originally from China and who constitute a substantial minority of the population. However, resigned to the odd situation, the reluctant leaders and the locals work together as well as they possibly can to ensure the survival of the group given the constraints of the highly contrived situation.
The ESFP in Brazil, led by Donny Osmond, Justin Bieber, Mariah Carey, Will Smith, Penelope Cruz, and Adam Sandler, suffer because of the incompetence of their leaders. Will Smith seems to think that he is in I Am Legend and urges everyone to prepare for the zombie apocalypse. However, the fun-loving ESFP are not on board with this. They do not have to deal with a hostile climate so they work, try to enjoy life the best they can, and try not to worry too much about the future.
The ENFP, led by Freddy Mercury, Ellen DeGeneres, Roger Stone, Glenn Beck, Gene Wilder, Alta, and Tipperary, work well together as a society in Australia. They find many dangerous animals and capture them. They do not plan to invade anybody else, but they want to be prepared to counterattack with Australia's scariest critters if anyone should come and attack. Many are irritated by Glenn Beck and Roger Stone, so they and their followers sail to New Zealand to live by themselves where they can build their own personal utopia. Ellen becomes the supreme leader. Gene Wilder becomes the assistant to the supreme leader. Freddie Mercury writes inspiring music. All is well.
The ISTP, located in India, are a conflicted lot - though their description reads: "Tolerant and flexible, quiet observers until a problem appears, then act quickly to find workable solutions. Analyze what makes things work and readily get through large amounts of data to isolate the core of practical problems. Interested in cause and effect, organize facts using logical principles, value efficiency", they are led by Genghis Khan, Mark Zuckerberg, Dwight Eisenhower, Bruce Willis, Han Solo, and Indiana Jones. Genghis Khan and Eisenhower quickly become military dictators. Many of the ISTP dutifully stay on earth. However, Bruce Willis, Indiana Jones, and Mark Zuckerberg pressure Han Solo into transporting them and whoever else of the ISTP on the Millenium Falcon to inhabit planets that are not at war. Mark Zuckerberg gives Han Solo his entire fortune to finance this. About half of the ISTP leave for other parts of the galaxy where they integrate with local Star Wars populations. Indiana Jones and Bruce Willis join the Jedi as they are both force-sensitive. Mark Zuckerberg goes to live with the Ewoks on Endor.
The INFP in Argentina, led by Beethoven, Luna Lovegood, Lisa Simpson, John Lennon, Edgar Allen Poe, Stephanie Meyer, Van Goff, and Sherpa Dave, produce beautiful art. Except for Stephenie Meyer. Upon examination of her work by the likes of Edgar Allen Poe, Stephenie Meyer is cast out for writing the Twilight books. Lisa Simpson is supportive of all of the artists who remain but becomes very anxious about the food situation. She confides this to Luna Lovegood, who remembers that it is possible to multiply existing food. So Luna commits about an hour a day to multiplying enormous amounts of food that Lisa organizes and has volunteers ship out to villages. Those who are interested in growing food also contribute. Most people like to grow their own gardens. They do not attack the ESFP and the ESFP do not attack them. For now, everyone in South America is safe.
The ESTP, located in the little-known land of Kazakhstan, led by Tyra Banks, Cenk Uyghur, President Monson, Rush Limbaugh, Oprah, Sinbad, and Babe Ruth are nervous about the elf ISFJ Mirkwood in southern Russia. However, they quickly realize they must adapt to the harsh continental climate in the steppes of central Asia. After doing their research about the area, they decide to head to the southeast for relatively milder winter weather and to take advantage of existing infrastructure for survival. However, this was a difficult journey and the ESTP were severely weakened.
The ENFJ, led by Jim Carrey, Ben Stiller, Kermit the Frog, Buggs Bunny, Robert Downey Jr., Tina Fey, Sheebs, and Anathema, find themselves on the southern coast of the Mediterranean. They are immensely pleased with the climate and food. However, they are alarmed by the presence of the INTJ on the same continent. They head west to Morocco. Those who are capable of swimming 10 or so kilometres swim across the Gibraltar strait and escape into Europe and attempt to migrate northward as much as possible.
The INTJ, led by the likes of Dumbledore, Gandalf, Professor X, Leonardo da Vinci, Aristotle, Captain Picard, and Tesla, know that despite their small population that they are intensely formidable. Dumbledore and Gandalf become best friends. Quickly realizing the great talent of Professor X, they heal him and restore his access to his powers. While Leonardo, Aristotle, Tesla, and Picard are muggles, Dumbledore and Gandalf see their obvious brilliance and begin to collaborate with them. Tesla tutors Leonardo and Aristotle in modern mathematics and science, which they learn very quickly. Caught up in their own brilliance, they neglect the rest of the INTJ, who do their best to survive in the vast forests of the Democratic Republic of the Congo. Picard finds this elitism intolerable and attempts to gather them and provide some leadership and support.
The INTP, located in Greenland and led by Einstein, Plato, Ayn Rand, Steve Jobs, Bill Gates, and L. Ron Hubbard, have conflict. Intensely jealous of Gates and Jobs, L. Ron Hubbard takes several INTP members and starts a cult to make money. Steve Jobs and Bill Gates use their immense wealth to transport the population to Iceland and the United Kingdom. Because of their immense power over both Apple and Microsoft, Steve Jobs and Bill Gates start hacking all of the computers in the world (except Linux ones). In their spare time, they teach Einstein how to program things. Ayn Rand and Plato secretly fall in love each other but spend much of their time arguing about self-interest and self-sacrifice.
The ENTP, located in Saudi Arabia and led by Napoleon, Theodore Roosevelt, Benjamin Franklin, President Hinckley, Alex Jones, Jay Leno, and Jamie Lee Curtis, find themselves in a vast desert. Napoleon constantly terrorizes everyone and is incredibly jealous of President Hinckley for being everyone's favorite leader. President Hinckley leads the people underneath the desert into the vast, maze-like caves where they hide and somehow find enough food and water to sustain themselves. Benjamin Franklin devotes his time to building secret treasure chambers like the ones in National Treasure. Jay Leno encourages him.
The ENTJ in Mexico, led by Conan O’Brien, David O. McKay, David Letterman, Mitt Romney, Bill Bradley, and Rachel Maddow, do all right for themselves overall. Mitt Romney becomes the president. They prepare to be invaded by the ISTJ.
The INFJ, located in Indonesia and led by Obi-Wan Kenobi, Thomas Jefferson, Captain Jack Sparrow, Lady Gaga, Brandon Flowers, and the guppy of doom, are grateful for their relative solitude. Jack Sparrow falls in love with Lady Gaga, but she rejects him. Hurt, he left the bigger group and took many with him to explore the islands. Obi-Wan starts training force-sensitive people in the ways of the Jedi so that the tiny amount of people have a chance at surviving.
After 1 year:
High Hackman of the ISFJ has mysteriously disappeared during the migration from Russia to the more temperature climates of Europe. The ISFJ have obtained heavy losses and continue to do so as they fight the ENFJ, who have been hanging around the Mediterranean and are well-fed and fortified. Ultimately, the ENFJ overtake them. Kermit the Frog has taken to wearing his dark hood and has proclaimed himself the supreme leader of the ENFJ. Tina Fey and Jim Carrey make fun of him behind his back but he finds out and has them assassinated. Buggs Bunny, enraged, plots against him. Ben Stiller, Sheebs, and Anathema are terrified.
The ISTJ continue their spread southward and easily overtake the ENTJ. They now occupy what was once Canada, the US, and Mexico.
Ellen, the supreme leader of the ENFP in Australia, has made the kangaroo the ENFP mascot and "Bohemian Rhapsody" the national anthem. Glenn Beck and Roger Stone rule over their hotbed of conservatism in New Zealand. Ellen makes fun of them. Freddie Mercury makes amazing music.
The ISTP who have remained on Earth have taken successful military action against the ESTP, who struggled to survive in Kazakhstan's extreme climate. Genghis Khan and Eisenhower, though they have their disagreements, are very effective together. They head toward Saudi Arabia to find the ENTP, who are living underground in hidden secret crystal caves. Mark Zuckerberg has successfully integrated into Ewok society.
Dumbledore, Gandalf, Professor X, Aristotle, Leonardo, and Tesla have found ways to integrate magic with modern technology. Tesla has been working with Professor X to recreate Cerebro so that they can control the minds of everyone in the world, though this is proving more complicated than expected. Aristotle and Leonardo have teamed up with Dumbledore to create flying boats, metal dragons, and wands that muggles can use. Gandalf supports them but is much more interested in controlling the weather and making giant bonfires. Captain Picard and the rest of the INTJ farm, hunt, and gather.
The INTP are living on Iceland as well as in the British Isles. Steve Jobs and Bill Gates have successfully hacked all computers in the world. Tesla of the INTJ based the new Cerebro on a jailbroken Apple device, something that Steve and Bill have noticed and are working on hacking.
The ISFP continue in their isolated existence in the area that was once China, hoping that they will be able to avoid all conflict. The ESFP continue to live in the moment, which they try to make fun. The INFP continue to make beautiful art. The INFJ continue exploring Oceania.
After 2 years:
The ENFJ, despite their smaller numbers, successfully take over continental Europe as the ISFJ fail to recover from their weakened state. However, they are spread fairly thin. They do not feel they have the resources to take on the INTP.
The ISTJ continue to spread southward and easily dominate the unprepared ESFP and INFP. However, they experience a profound existential crisis when they examine the art of the INFP and lose the will to keep conquering. They have "successfully" taken over the Americas, but could they have made other choices? Would the consequences have been better, or could they somehow have been worse? It seems, somehow, that they may still be free to choose. Perhaps they had been throughout their conquest as they sent so many individuals into the unknown. With terror, they realize that perhaps they sent all those people to oblivion. How can they continue to believe that there is meaning in life when the universe had contrived such a cruel situation? Torn between admiration of art and a crushing sense of nihilism, the ISTJ became paralyzed by a sense of total absurdity.
The supreme leader, Ellen, remains popular with the ENFP as she rules with benevolence and absolute hilarity. She spends much of her day hiding in public places so that she can jump out and scare people.
The ISTP languish in Saudi Arabia, completely at a loss to find the ENTP hiding in the extensive caves beneath the desert. After months of searching, they fizzle out in the hot landscape and were no more. Mark Zuckerberg is now the leader of the Ewoks.
With regard to the activities of the INTJ, Tesla is on the verge of completing the new Cerebro for Professor X. Dumbledore, Aristotle, and Leonardo create more whimsical weapons. Gandalf continues making bonfires. Steve Jobs and Bill Gates of the INTP are way ahead of Tesla and have the Cerebro under their total control. They have also started hacking the of the computer-based inventions of Dumbledore, Aristotle, and Leonardo.
The ISFP continue their peaceful lifestyle. The INFJ continue their seafaring life.
After 3 years:
Ready to unleash havoc, the INTJ leaders arm their subjects with wands that muggles can use and set out to take over the world with science and magic together. However, at the last moment before attacking the ENFJ, ENTP, ISFP, and INFJ, Steve Jobs and Bill Gates of the ENTP crash their entire system so that absolutely none of the magic-science inventions worked. In a wave of unsuppressible frustration, Gandalf creates such intense weather that everyone on Earth's surface dies. Including himself.
Ultimately, only the ENTP, led by Napoleon, Theodore Roosevelt, Benjamin Franklin, President Hinckley, Alex Jones, Jay Leno, and Jamie Lee Curtis, survived as they hid in the extensive underground caves. Somehow, they had also been joined by High Hackman. However, their victory felt empty.