Have you ever met an heir or an heiress to a large fortune? Most of them are coke heads. Without the actual culture of spiritual and moral training heirs would be incompetent and feudalism would quickly lead to anarchy. I don’t think modern society and culture could produce people like Alexander the Great. Non-western societies (e.g Asia/Singapore) have enough family values that feudal dynasties could work, but wouldn’t bet on it happening in the western world.