Scientists hypothesize that disrupting our communities may increase our susceptibility to infectious diseases, predispose us to certain cancers, and contribute to conditions such as asthma and other allergies, irritable bowel syndrome, crohn's disease, and autism.

Microbial

Explanation:

Microbial communities defend human body against pathogenic microbes which are responsible for disease prevalence. Some of the prime examples of diseases that are transferred through pathogenic microbes to their host are Salmonella, Dengue and E. coli etc. Hence, disrupting the microbial communities can make us more susceptible to diseases.

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.