All the world wars both WW1 AND WW2 involved only European countries except for Japan which was influenced by western values. Everything else was Germany, France, Britain, Greece and Italy were fighting with each other and causing havoc.
Mao Zedong killed 75 million people
Sino Japanese war 22 million
Mongol conquests 40 million
Qing dynasty 25 million
Taiping rebellion 100 million
An lushan rebellion 36 million
Dungan revolt 12 million
Timure lang conquests 20 million
Yellow turban rebellion 7 million
Throughout the history of man every creed, race and colour has gone to war at one time or another. Once hostilities start, occasionally there is no option but to fight. What do you think your position in the world would be right now, if Britain, Canada, the US, Australia etc had not fought against the Nazi regime?
Yes, the Europeans started both world wars. Which was good news for African nations since after the second world war European colonial powers had to leave. African nations began regaining their independence free from colonial rule.