It's 100 years in the future, and we've decided to end all war and crime. How do we plan to accomplish this? Through rigorous study of personality theory and human interaction, we've identified 50 unique people who have above-average intelligence, empathy, and physique, and who all seem to get along with each other. Instead of leaving our human propensity for violence and greed to fate, we've decided to phase out natural, random birth. All humans born from this point forward must be genetic clones of one of the chosen 50.
Assuming we could actually enforce this, how would society evolve? What unforeseen problems might we encounter as society slowly approaches (and after it reaches) a state of only 50 unique human genotypes in existence?