The document discusses rural and urban communities. It notes that rural communities originated first through agricultural settlements in villages, while urban communities developed later around cities focused on trade, politics, industry or religion. The key differences between the communities are that rural areas have agricultural occupations, a natural environment, smaller and less dense populations, more homogeneity and lower mobility, while urban areas have non-agricultural jobs, artificial environments, larger and denser populations, more heterogeneity and stratification, and greater mobility. Both community types face their own health issues such as diseases, pollution, and stress.