"I am large, I contain multitudes," Walt Whitman famously declared. The truth is, we all do. We all consist of many parts or subpersonalities, each with its own perspective, thoughts, feelings, and agendas. To act more efficiently, and more in line with our truest values, goals, and desires, this team needs a leader: a Captain. In Multitudes, Matthew Gardner explains:what subpersonalities are; why, when and how they are formed; how to locate your Captain and empower them to take charge; how your Captain can convert your subpersonalities from loose cannons into helpful allies; what the most common types of subpersonality are, how they operate, and how to deal with them; how subpersonalities interact with each other and with other people's subs; and what the implications are for our world when so many people are being led around by limited, often misguided aspects of themselves. Along the way, he offers numerous insights into what counselling really is, and how people really can change and heal.