Why are ancient religions gone?

Well I can only have the guess that the new ones just outlived the old ones. Just like life.

Christianity appealed to the masses. Anyone could be a christian. It was not an exclusive club; anyone could join. So when Zeus was being forgotten along with his people, christianity was telling people "forget about them, our new club lets anyone in. Only one true god! Anyone can be one!"

Pretty much the more accepting and benevolent religions survived. The harsh ones were good to control a civilisation, but when the cilvilisation died, the religion went down with the ship.

 

q?

true, but does that make Christianity liberal? They wouldn't want to hear that......