Why are capitalism and communism consider as polar opposites?

Answer 1

Communism work on the justice behind the assumption that the earths resources are the property of all the people and and that the bounty of this should be shared by all. Capitalism works on the assumption that that the earths resources can be monopolised by an exclusive group of people and be distributed by them for reward to those that require them to make a living. The problem with Communism is that some people are more productive then others causing hard feelings among the more productive people. the problem with capitalism is that the people in charge need no more then the privileged position that was left to hem by wealthy parents or benefactors. in both systems greed and corruption rears supreme in the end.

Answer 2

capitalism you have the government playing no role in the market and economy vs. socialism / communist where the government rules the market and in capitalism you have, haves (people with stuff) and have not's (people without stuff), while communists seek to make a place where everyone has everything. so they don't go together that much that's a part of why the cold war started, just two competing systems.