Of course. Polygamous societies can afford to lose men in wars and riskier adventures that cause the society and culture to expand (by your logic).
Again I don't accept the religions spread solely because of their features that beat out other religions in adaptation. It ignores that people may be convinced about the content of the religion, which people back then would have cared about more, rather than the features of the religion, which we modern people care about nowadays more.
Many religions are unaccepting of people born outside. Hinduism is an example. Even only one section of Hindus was actually allowed to even study the religion at all.
Like I mentioned, and which you ignored, religions like Jainism and Buddhism would have died out. What about Zoroastrianism, Manicheanism, etc. caused them to die out vs something like Jainism.
Again I don't accept the religions spread solely because of their features that beat out other religions in adaptation. It ignores that people may be convinced about the content of the religion, which people back then would have cared about more, rather than the features of the religion, which we modern people care about nowadays more.
Many religions are unaccepting of people born outside. Hinduism is an example. Even only one section of Hindus was actually allowed to even study the religion at all.
Like I mentioned, and which you ignored, religions like Jainism and Buddhism would have died out. What about Zoroastrianism, Manicheanism, etc. caused them to die out vs something like Jainism.