Humanity faces numerous existential risks, such as war, disease, and climate change.

Although we now know that such an outcome is physically impossible, an existential risk was nevertheless present then.

An existential risk narrowly refers to any factor threatening the existence of humanity.

Some scholars have strongly favored reducing existential risk on the grounds that it greatly benefits future generations.

Therefore, reducing existential risk by even a small amount would have a very significant impact on the expected number of people that will exist in the future.

Some economists have also discussed the importance of existential risks, though most of the discussion goes under the name "catastrophic risk."

A category of existential risk are consequences of technology.

Our approach to existential risks cannot be one of trial-and-error.

The scope of this article is existential risks.

A large nuclear war is considered to bear existential risk for civilization on Earth.