Effective altruism (EA) is a 21st-century philosophical and social movement that advocates "using evidence and reason to figure out how to benefit others as much as possible, and taking action on that basis".

People who pursue the goals of effective altruism, sometimes called effective altruists, often donate to charities or choose careers with the aim of maximizing positive impact.

Effective altruists emphasize impartiality and the global equal consideration of interests when choosing beneficiaries. Popular cause priorities within effective altruism include global health and development, social and economic inequality, animal welfare, and risks to the survival of humanity over the long-term future.

Effective accelerationism, often abbreviated as "e/acc", is a 21st-century philosophical movement that advocates for an explicitly pro-technology stance. Its proponents believe that unrestricted technological progress (especially driven by artificial intelligence) is a solution to universal human problems like poverty, war and climate change. They see themselves as a counterweight to more cautious views on technological innovation, often giving their opponents the derogatory labels of "doomers" or "decels" (short for deceleration).

The movement carries utopian undertones and argues that humans need to develop and build faster to ensure their survival and propagate consciousness throughout the universe. Its founders Guillaume Verdon and the pseudonymous Bayeslord see it as a way to "usher in the next evolution of consciousness, creating unthinkable next-generation lifeforms."