Actually, Umair, capitalism is quite natural, but it only represents half of humanity’s two major impulses. We have both a social impulse and a individualistic impulse. Both are needed in balance for a well run society — a balance of generosity and selfishness.
For instance if the Koch brothers ran the world they would end up with all the wealth (even though they do engage in a bit of philanthropy for PR purposes). On the other hand if Warren Buffett and Bill Gates ran the world, not only would then do well, but they would see to it that others did too. They are good at exercising both their selfish capitalistic impulse and their generous socialistic impulse — perfect.