Family love is like the wind: instinctive, raw, fragile, beautiful, at times angry, but always unstoppable. It is our last miracle. So writes James Mcbride, in his prologue to this first of three collections of photographs aiming to depict the joy, heartbreak and love that shape and make up our lives. The photos were selected by Elliot Erwitt from 1000s entered by professional and amateur photographers to explore the idea of family.