People have had intellectual disability throughout history. People with intellectual disability have had a lot of trouble in the past. The oldest idea of where intellectual disability came from was in ancient Greece. Hippocrates thought that intellectual disability was caused by an issue with the four humors. For several hundred years in Europe, churches took care of people with intellectual disabilities. In the 17th century, Thomas Willis suggested that intellectual disability was a disease caused by issues with the structure of the brain. In the 18th and 19th centuries, people with intellectual disabilities were put in asylums. The asylums would give them basics like food and shelter, but were not always good to the people in them. In the early 20th century, people with intellectual disability were made to not be able to have children and could not marry. It was thought that this would reduce the amount of intellectual disabilities in the future. This is not done anymore because it does not follow the idea of human rights.