Complex sentence: The two major forms of social ownership include society-wide ownership or public ownership, where the economic surplus produced belongs to all members of the public; and co-operative ownership, where the economic surplus of enterprises belongs to all the member-workers of said enterprise.
Split into simpler sentences: The two major forms of social ownership include society-wide ownership or public ownership and cooperative ownership. With public ownership, the surplus belongs to all members of the public; with co-operative ownership the economic surplus of an enterprise belongs to all the member-workers of said enterprise.