"How likely is it that a genocide on scale with the Holocaust could happen again?
Could history repeat itself? Or has the world learned to prevent it?"

I think that there's a possibility

Explanation:

Muslim camps already exist in China, and there's a lot more torture and enslavement happening in other countries that we may not even know about. History could definitely repeat itself. Genocides and murders happened before the holocaust too like the murder of native americans by colonists in america. The holocaust is taught because of the great amount of jews murdered but smaller genocides have happened before, so it can happen again.

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

silk

indigo  

rice

all the other answers are wrong