Here’s an excellent speech by Lew Rockwell, President and founder of the Ludwig von Mises Institute.
As he says, people who detest capitalism implicitly pay homage to it by clamouring to buy the products it turns out. Everything you love – art, TVs, music, computers and so on – you owe to capitalism. The only way to find out precisely how much you owe to capitalism is to go and live in North Korea.
Ideas have consequences. When people strongly advocate something without fully understanding the consequences, people can die. Millions can die. Take Marxism for example. To take a less extreme example — people are dying right now in the USA because of the Food and Drug Administration’s slow and inefficient drug approval process.