What is the origin of evil?
There is no one source of evil. Evil can originate in fear, which can override cultural and societal constraints and thus separate us from our humanity and cause people to commit unthinkable acts. Neurological glitches can also be the source of evil.
What is the meaning of life?
Good question, let me know when you find out. You just let it happen and observe. The meaning is different for each of us because it's a subjective experience.
What question is missing?
A question about love, loving, and being loved. How do you determine the existence of these concepts?