It's the 'peace of mind' bit that's significant in this question. What exactly does the questioner mean by it?
For to have peace of mind you might need money, enough to not have to worry about it. Then again, to have peace of mind you might find that you need to have a 'purpose' in your life. And such good health that you never need to pay it much attention. As for 'child bearing,' in a man's world that might not enter the equation at all. The world already has too many people in it, and it is only vanity to want to continue 'the family name.'
Someone said, "Love," and that is true. We need to love ourselves unconditionally at all the levels of our being. When we can do that we can love one another in the same way. We might like some of the others particularly, but we can love them, so I'm informed. But then, loving in such a way would bring 'peace of mind.' So what have we got that is not listed in the four qualities or abilities mentioned in the question?
Life, we're told, is a journey. Therefore to have peace of mind all the time we're travelling might result in boredom. So maybe, deep down - at least when we're young and still seeking adventure - we don't want peace of mind at all.
You know, dear readers, I don't think this question can be answered.