I have worked with Habitat for Humanity for awhile.

Older fatherhood isn't all bad: testosterone rates drop about 1% per year as men age, making them less reactive and more patient, and a professionally established middle-aged man is likely to have more time and money to devote to his kids than a twenty-something who's just getting started.

Study until twenty-five, investigation until forty, profession until sixty, at which age I would have him retired on a double allowance.