(biological warfare, overpopulation, nucle "Suppose in the futuresomething disasterous happens to our planet (biological warfare, overpopulation, nuclear war or whatever else that could be probable) and there are only a few thousand people left to procreate. If this was the case and you had the chance to put one singe piece of advice to guide the future in the "right" direction, a book of guidelines to follow in order to achieve more of a utopian lifestyle what would you add to the book."