WHY DO PEOPLE DO THAT?

Why do so many humans copy what others are doing rather than thinking for themselves? That applies in many situations. It can become a pack mentality.

If those who are in the world's military forces were to consider what they were doing instead of blindly obeying orders, there wouldn't be any wars. The same with governments but they are forced to conform to what their party decrees. There are many psychopaths running dictatorships, propped up by the military that follow blindly for their own advantage rather than thinking of others. They are given permission to exercise their basest excesses towards those who are considered a danger to the regime.

World governments are occupied by those who are filled with a sense of their own self importance. They are filled with corruption and greed, getting out it what they can to increase their wealth and fame.