In the past 40 years:
Russia invaded Afghanistan, Hungary, and oppressed various countries, fights Chechen rebels and kills 100,000s and supported many dictatorships including Castro.
In the past 40 years the US killed Chile's president, invaded Vietnam, bombed Cambodia, financed the Contras , armed Saddam and supported military dictatorships in Latin America and elesewhere.
In the past 40 years the UK armed the Israelis, the Indonesians, Saddam Hussein, Oman, supported apartheid in South Africa etc..assasinated Irish Catholics etc.
Pots and kettles??
you missed out,
In the past 40 years the USA kept the peace in Europe.
In the past 40 years the USA kept Russia out of Europe.
In the past 40 years when the French pulled out of Vietnam the USA stepped in to fill the void, look what happened when they pulled out more mass murder by if memory serves me well Pol Pot.
The Irish Catholics assasinated just as many Brits.
Perhaps in another 40 years somebody will write that the USA saved millions from mass murder