Not true.  That is a myth peddled by capitalists.  Everyone is susceptible to bad behavior, that does not mean everyone is choosing to behave badly.  People are also highly keen on sharing.  Capitalists spend an enormous amounts of energy  trying to beat that instinct out of us through schooling and propaganda. 

 WTF are you on about? Capitalism is just what people naturally do. It's not some made up construct. Capitalism just means that you own what you make and are entitled to to any profit from your property.