Is the world inherently good or bad? You might believe that people are essentially good. Then again, you might believe that most people just pretend to be good -- and some don't even bother to conceal that they're not. You might complain that it's a stupid question in the first place.

Because how can you answer such a question? Disregarding humans for a moment, the meaning of life is to make more life, to get your genes into the next generation. Things that help achieve this aim could be regarded as good; things that thwart it, bad. This is the selfish-gene view of life, in its starkest sense.

But the selfish-gene view was never meant to validate a way of life; it was a metaphor to describe life from a gene's point of view. Nevertheless, it is common to hear people equate selfishness in behavior to the perceived selfishness of their genes. What if you could peer into someone's head and see if they were joking or not? That might get you some way toward answering the question set out at the beginning.