Final answer:
The inability to sustain a large population was due to a lack of food surplus in hunter-gatherer societies and later challenges such as disease, weather dependence in agricultural societies, and factors limiting city development like inadequate sewage and immigration restrictions. The considerable distance from rural homes limited efficient migration to cities, exacerbating these challenges with inadequate infrastructure.
Step-by-step explanation:
The area was likely unable to sustain a large population primarily due to the lack of food surplus which is crucial for urban populations. During the era of hunter-gatherers, there was no significant surplus of caloric energy, or food, leading to generally static population levels. The hunter-gatherer lifestyle was precarious and did not support significant population growth. Once agriculture was introduced, food surplus could support larger populations, but it also made communities more vulnerable to diseases and dependent on weather, as agricultural communities could not easily migrate like hunter-gatherers.
Moreover, the challenges of developing a city, as explained by sociologist Gideon Sjoberg, include the need for a good environment with fresh water, advanced technology for producing a food surplus, and strong social organization. These factors, along with inadequate sewage control and immigration restrictions, limited the size of ancient cities. The considerable distance from people's homes to the cities exacerbated these issues since transportation was limited and inefficient, hindering the ability of people, especially serfs, to move to urban centers, thus contributing to the challenge of sustaining large populations within cities.
Lastly, the influx of people into cities without the necessary infrastructure led to environmental degradation and psychological stress. The transition from rural to urban life, particularly in unforgiving city environments like those in London during the 1840s, proved difficult for many who grew up in farming communities. This rapid urbanization often outpaced the preparation of cities to handle such growth.