Through his research, he was able to shift the focus from a behavioral point of view, which was the dominant approach at the time, to an evolutionary approach. It showed that tactile comfort was more important for forming attachments than just feeding the infant, which was evident since each monkey preferred the cloth mother. Additionally, additional research has shown that contact with others is necessary for self-development. After keeping the monkeys in isolation, it was clear that they could not function normally in society and were being bullied. This shows that infants need contact with others, suggesting that daycare is beneficial because infants have regular behavior.