Tom Liggett passed away May 12, 2020 in Los Angeles. Tom was the editor of the Annals of Probability from 1985–87, gave the Wald Lectures in 1996, and was elected to the National Academy in 2008. He is best known for his two books on interacting particle systems.

Rick Durrett said, “Tom is best known for his two books on interacting particle systems. The first one, written in 1985, which introduced the world to the subject, has been cited more than 5,000 times. By the time he wrote his 1999 book, the field had grown so large than he concentrated on three examples: the contact process, voter model, and simple exclusion process. His books and papers are known for their clear and elegant proofs.”

A fuller account of his work can be found in an account of his 75th birthday party conference in the June/July 2019 IMS Bulletin. An obituary will follow.