Dude, trying to gain an evolutionary advantage by "restraint in breeding" is like trying to get rich by overpaying your income tax. Hey, every extra dollar you give the IRS is one dollar removed from the national debt, which should improve the economy... and give you as an individual some utterly microscopic imperceptible benefit, w00t!
Gotta love that watchmaker analogy. Turns out the human circadian (sleep-wake) rhythm is a little bit over 24 hours long - more like 24:11, so your body is always pushing you to go to sleep 11 minutes later every day. (Thankfully it tends to synchronize with light and darkness, so it doesn't get too far off schedule.) That's some nice watchmaking there, God.