After hunter-gatherers left their nomadic ways behind to settle down with friends and family, they made their homes in different types of communities. Over the millennia, some people settled in tiny villages, others chose small-town living, and still others resided in the crowded capitals of vast empires. In this issue, you will read stories about many of the ways people have lived across the ages. One such account is that of the splendid city of Dongjing, later known as Kaifeng, the capital of China’s Northern Song Dynasty from the tenth to twelfth century A.D. At its height, Dongjing was the world’s largest metropolis, with a population of more than a million, and featured wide boulevards, bounteous markets, bustling river traffic, and a renowned bridge crossing the Bianhe River. Stories of…