We live in small worlds.

How We Are is an astonishing debut and the first part of the monumental How to Live trilogy, a profound and ambitious work that gets to the heart of what it means to be human: how we are, how we break, and how we mend.

In Book One, How We Are, we explore the power of habit and the difficulty of change. As Vincent Deary shows us, we live most of our lives automatically, in small worlds of comfortable routine--what he calls Act One. Conscious change requires deliberate effort, so for the most part we avoid it. But inevitably, from...