Stoicism is indeed a very comprehensive and rich philosophy of life (and perhaps easier to make coherent with modern natural and social science than Zen Buddhism or Objectivism), but I don't plan on talking about Stoicism as such (which IMO, is slightly off-topic for a Less Wrong meetup, but also extremely interesting to me personally). Instead, I will only be discussing a few of the psychological hacks first written down by the Roman Stoics that seem justified on evolutionary psychological grounds.