Longtermism is the ethical view that positively influencing the long-term future is a key moral priority of our time. It is an important concept in effective altruism and a primary motivation for efforts that aim to reduce existential risks to humanity.[1][2]
The key argument for longtermism has been summarized as follows: "future people matter morally just as much as people alive today; ... there may well be more people alive in the future than there are in the present or have been in the past; and ... we can positively affect future peoples' lives."[3][4] These three ideas taken together suggest, to those advocating longtermism, that it is the responsibility of those living now to ensure that future generations get to survive and flourish.[4]
:9
was invoked but never defined (see the help page).