In fact, I would argue that democratic societies experience fewer atrocities because their governments are beholden to the people and do not have absolute power.
The reality is because you’re too busy inflicting them on everyone else, and to people it’s socially acceptable to hate within in your society (criminals, homeless people, ethnic minorities).
Wars are an inevitable part of human society.
muh human nature, pay no attention to the material conditions behind the curtain marx-goth