The OP said, "People work hard to ensure procreative success, but will spare energy when possible."
I have no children, have zero desire to have children, have only moderate tolerance for children. I'm lazy about some things, driven about others. It has nothing to do with procreation. It might be related to sex, though, insofar as I hate being bored, and sex (when done right) is anything but boring.
The OP said, "People work hard to ensure procreative success, but will spare energy when possible."
I have no children, have zero desire to have children, have only moderate tolerance for children. I'm lazy about some things, driven about others. It has nothing to do with procreation. It might be related to sex, though, insofar as I hate being bored, and sex (when done right) is anything but boring.