Say we succeed in bringing down Capitalism. Then what?

What do you think we should replace it with? Some years back, when my country replaced a corrupt, entrenched coalition govt of 60+ years, the winning party sort of looked around and said: 'uh.. huh, OK, we won. We werent expecting to win. Now what? We have no plan. Lolz?'

In that light, what do you think should replace the big C, and how do we ensure human nature doesnt juat exploit it for a few individuals benefit?