Different moral perspectives on existential risk reduction (x-risk reduction) have different implications for how much to prioritise x-risk reduction in general, as well as for which specific x-risks to prioritise reducing. In the effective altruism community, the moral perspective most associated with x-risk reduction is longtermism: existential risks are often seen as a pressing problem because of the astronomical amounts of value or disvalue potentially at stake over the course of the long-term future. But other moral perspectives could also lead to a focus on x-risk reduction.
For example, in The Precipice (Ord, 2020a), Toby Ord discusses five different "moral foundations" for the importance of x-risk reduction:
The "present"-focused moral foundation could also be discussed as a "near-termist" or "person-affecting" argument for x-risk reduction (Lewis, 2018). In the effective altruism community, this is perhaps the most commonly discussed non-longtermist moral argument for x-risk reduction. Meanwhile, the "cosmic significance" moral foundation has received some attention among cosmologists and physicists concerned about extinction risk....