1. If human nature is good left to itself, then from what source did the corruption enter in?
2. If you say religions caused it, then you must be claiming that aliens or mystical beings from outer space created religions because if people did, then people are their own corruption.
3. If you say societies caused it, then you must be claiming that aliens or mystical beings from outer space created societies because if people create them, then people are their own corruption.
4. If you say education or school systems caused it, then you must be claiming that aliens or mystical beings from outer space created educational systems because if people did, then people are their own corruption.
5. If you say parenting or upbringing caused it, then you must be claiming that aliens or mystical beings from outer space created systems for parenting or upbringing because if people did, then people are their own corruption.