On Friday, November 16, 2018, the Science History Institute hosted its annual Ullyot Public Affairs Lecture to a sold-out audience. This year’s lecturer was Jennifer Doudna, a biochemist who is one of the scientists credited with discovering the molecular tool CRISPR-Cas9. This discovery, made in 2012, provided the foundation for gene editing, enabling researchers to make specific changes to DNA sequences in a way that was far more efficient and technically simpler than earlier methods. Endowed in 1990 by chemist Glenn Edgar Ullyot, the Ullyot Public Affairs Lecture seeks to illustrate how chemistry, biology, and the sciences in general contribute to the public welfare. The lecture is free and open to the public.