If the whole world was SJ: there would be no civil rights, everyone would work themselves to death, we wouldn't have the innovation to get past the age of agriculture. people's emotional needs would pretty much never be met and their would be large number of wars and suicide attempts because of this
If the whole world was SP: life would be crazy and fun party, but we would still all be hunter gatherers and the life expectancy would average around 30 to 40 years. actually when you factor in the number of people who would die from attempting impossible stunts and the amount that would be murdered from primal dominance struggles, the average may be much lower
if the whole world was NF: everyone would die off because they would lack the survival skills and primal instincts to survive in the wilderness while at the same time lacking the organization, collectivism, routine and compliance to rules to form a society. until that time tho, it would happy and fun (with the exception of everyone complaining about how uncomfortable they were) because everyone would be nice and supportive of each other and people would sit around doing artistic stuff all day like playing primitive instruments and telling stories
if the whole world was NT: societies would be nothing more than a vast network of strategic alliances. technology and comfort would be relatively advanced, but everyone would be constantly plotting against each other and if you didn't have your guard up at all times, you would die from being stabbed in the back. the overall picture would resemble Silence of the Lambs, Sun Tzu's Art of War or Death Note.
now what would the world be like if everyone was your specific type?