During the hunter-gatherer phase humans lived mainly in caves or built temporary homes. They moved from one place to another when food sources depleted. They moved around in search of nuts, fruits and meat.
During the agricultural revolution, man needed to live by rivers or other water sources in order to get water for agriculture. He could no longer live a nomadic life and therefore settled along banks of rivers. He built houses and soon started living in communities and soon villages,
With industrial revolution setting in , man started migrating to cities and towns where industries came up in search of sources of livelihood. With better means of transportation available, man started living far from industrail areas. He used rails, buses and cars to commute to workplace