Biographer Walter Isaacson's latest book tells the story of biochemist Jennifer Doudna. She helped develop a controversial tool that has the power to transform the human race. CRISPR can edit genes to cure diseases but can also be used to create designer babies.

In 2017, Jennifer Doudna spoke with Walter Isaacson, then president of the Aspen Institute, about gene editing and what it could mean to have the power to control evolution.

Jennifer Doudna speaks with Walter Isaacson about the latest technological developments in gene editing and the unthinkable power to control evolution.