Moreno's Law is a principle in sociology that suggests that the number of relationships a person can maintain is limited by the number of people they can effectively interact with. This law highlights the importance of social connections and the challenges of managing multiple relationships in a meaningful way. The law is named after Jacob Moreno, a psychiatrist and sociologist known for his work in group therapy and sociometry. He emphasized that as the number of relationships increases, the quality of each relationship may decrease, making it harder to maintain deep connections.