Humanity should simply develop and make its life more convenient.
I pick this aspect of your post. Capitalism indeed encourages individual growth which helps the society. It allows an individual the opportunity to even help to support the country and people at large since it allows for business to striving far from what it can be with socialism.
I think there are good things to pick from these economic theories. The problem is being fanatical about them even when they appear not to work in certain situations.
By the way, I prefer any economic model that is based on doing what is really good and right. What ever you choose to create or do, if it's really good, (maybe with very little disadvantage) do it... if it's bad(with lots of disadvantages) , don't do it otherwise you get punished by the law especially if you are aware of the many consequences of your creations.