And few countries have cause more deaths. Like 2 million dead in Vietnam, quarter a million in Iraq, etc. 

You know when most people were freed? When Gandhi protested non violently. That freed the 1.5 billion people in South Asia. African leaders like Mandela freed another 1 billion. Asian leaders like Sukarno, Ho Chi Minh, etc freed half a billion. Sun Yat Sen freed 1.3 billion Chinese.

You really need to read some world history!