Jim Watson, who deciphered the genetic code, famously said, ‘There are only molecules; the rest is sociology,’ adding fuel to C. P. Snow's complaint that Science and the humanities are two fundamentally different "cultures" which will never meet. The authors argue provocatively, yet convincingly, that the molecule that allows us to bridge the chasm between them is dopamine. Though written for ordinary people, the narrative is sprinkled throughout with dazzling new insights that will appeal equally to specialists.