Economic growth is the expansion of inflation-adjusted income over time, usually due to growth in population, investment, or innovation. Economic growth has attracted the attention of the effective altruism community both because growth appears to be a highly cost-effective way to reduce global poverty and improve human wellbeing, and because expected rates of economic growth in the coming centuries have, in the words of Future of Humanity Institute researcher Ben Garfinkel, "some bearing on almost every long-run challenge facing the world, from climate change to great power competition to risks from AI."[1]