Both socialism and conservatism depend upon exaggerations of human nature. Because we are occasionally altruistic and both parties feel good about it then we need more of it between everybody permanently. Because we are in groups characterised by pecking order, then we are justified in preventing those below us getting what we have obtained — because we deserve it.
No matter how individualistic we say we are, we all belong in groups and basically belong to one or another. And once we’re there, our group, or culture or nation is always superior and the other is always deficient. In times past this was natural and practical. Today it can often be dangerous — or at least highly inefficient.