Historians point to three main reasons for the fall of ancient Rome:
A decreasing belief in religion caused the Roman people to care less about honesty and ethical behavior. This resulted in increased crime and social problems.
The use of the poisonous metal lead in water pipes and cosmetics created health problems and mental illness in much of the population.
Climate change affected the environment and resulted in cooler summers. This had a negative effect on agriculture. There was simply not enough food for the people of Rome.
The use of lead health problems and mental illness.
Climate change cooler summers.