Kelsey Piper is an American journalist who is a staff writer at Vox, where she writes for the column Future Perfect, which covers a variety of topics from an effective altruism perspective.

[4] After graduating from Stanford in 2016,[3] Piper worked as the head of the writing team at Triplebyte, until she left to join Vox as a staff writer.

[5] Since 2018, Piper has written for the Vox column Future Perfect,[6] which covers "the most critical issues of the day through the lens of effective altruism".

[8] Piper argued that the 21st century may be the most pivotal in human history, due to unprecedented existential risks, such as from advanced artificial intelligence and engineered pandemics.

[11][12] Since then, she has discussed the societal risk posed by inaccurate study preprints[13] and analyzed the impact of the pandemic on the historical scale, deeming it one of the ten deadliest in human history.