Mankind can go extinct in both natural and man-made ways. Examples of natural extinction risks are asteroid strikes and supervolcanoes. Most important about the natural existential risks is that they are:
- Small, and
The total natural extinction risk for the next hundred years is roughly 0.01%, or extremely small. Man-made extinction risk, on the contrary, is estimated at 17%, or 1700 times larger. Therefore, natural extinction risk is so small that it may be neglected in an existential risk discussion.