How we define “home” can be difficult and deeply personal. Is it where you were born, or where you live now? What if you were forced from your city or village to settle elsewhere? Boris Benjamin Bertram’s documentary The Human Shelterargues that one of the most fundamental ways by which we answer those questions — and grapple with the nature of home, in all its forms — is through shelter, be it a house, apartment, lean-to, or tent.