Although not very much to their liking, it was the Victorians who made the discovery that the human being was not an example of an act of special creation on the part of the Almighty, but instead, another animal that had evolved. Since Victorian limes many have claimed that humans could not be regarded as being unique; homo sapiens was nothing but another animal species.
The word capitalism is now quite commonly used to describe the social system in which we now live. It is also often assumed that it has existed, if not forever, then for most of human history. In fact, capitalism is a relatively new social system. For a brief historical account of how capitalism came into existence a couple of hundred years ago, see Marx and Engels' Communist Manifesto.
But what exactly does 'capitalism' mean?
Central to the meaning of socialism is common ownership. This means the resources of the world being owned in common by the entire global population.
But does it really make sense for everybody to own everything in common? Of course, some goods tend to be for personal consumption, rather than to share—clothes, for example. People 'owning' certain personal possessions does not contradict the principle of a society based upon common ownership.
The Parties within the World Socialist Movement stand uniquely against capitalism. We reject that system utterly and completely in whatever guise it appears: State capitalism, run by "communists", "mixed-economy" capitalism, run by "socialists", social-democrats or centrists; or the more openly vicious variety of unfettered "free" capitalism run by the less pretentious political gangsters.