A question with a big twist.

You are given a button. You're told that this button will randomly kill one-third of the world, which could include you yourself.

The catch is, if you don't press the button, the whole, 100% of humanity dies out.

Would you take it slow and do population reforms, which would have a 25% chance of saving humanity, but won't kill anyone?

Or would you be surer and press the button, killing 2 billion random people, which could include you?

Think deep. Think hard.
Answer big. But don't answer fast.