This document discusses why and how human settlements started. It defines settlement as a place where groups of people live, ranging from small villages to large cities. Key factors that influenced where settlements were located include site (the physical place), situation (location relative to other features), resources like food and fuel supply, defense, and access to water or transportation routes. Settlement sites were commonly located on high dry ground, by rivers/springs, in defensible positions, at river crossings, or where several transportation routes intersected. Understanding site selection is important for studying less economically developed countries today.