You're conflating issues: governments started wars, they lost, new governments did not want to repeat the war because the people that elected them opposed it.

Human rights, at least in the US, were the won by a lot of suffering from the ordinary people, not by the benevolence of any senator/congressman/president. They passed the laws to appease the people, not because they wanted to.

Science comes when governments do not impede research. Do you think SpaceX would have existed if the government decided to help? NASA has become a shell of its former self, launching rockets into space that cost more than who knows how many Falcon launches. Government at work.

I could go on, but we, as a species, need a government to kind of keep peace amongst our selves and not go overboard too much. But more than that, governments are a hindrance to human evolution and development.