After the landslide communist victories in elections throughout eastern europe after wwii, why didn't the us try to stop the spread of communist influence then?

What is the difference between external & internal migration

According to the united nations refugee agency, more than 2/3 of the world's refugees come from just five countries. which country is not on that list? a) turkey b) myanmar c) afghanistan d) south sudan

In a world that produces enough food for every human, why is the distribution of food consumption and production so unequal? in a few sentences, explain why production and consumption of food is lower in the least-development countries (ldcs).