[holografix]

Yuval Noah Harari argues in “Sapiens” pretty convincingly that communism and capitalism are religions.

[dghf]

I think it's not so much that he argues they are religions, but that he uses a definition of religion that encompasses them: viz., the belief in an order that is not of human invention but that imposes human moral norms.

But that definition is possibly the only fully consistent and coherent one I've seen that covers everything commonly regarded as a religion; it just covers quite a bit extra, too.