Says who? Western, educated, industrialized, rich and democratic folks, of course. Don't get me wrong, there is an underlying reality behind the oft-repeated claims of 'Whig history' https://en.wikipedia.org/wiki/Whig_history . In particular, democratic and classical liberal values seem to do an unusually good job of de-escalating unwanted social conflict: NPOV (as known on Wikipedia) is at its root a "liberal" idea, not an authoritarian or intolerant one! But these overbroad claims should always be treated with plenty of caution.