What conclusion did Harry and Margaret Harlow reach in their research efforts with the monkeys?

In their research efforts with monkeys, Harry and Margaret Harlow concluded that a mother's contact and affection are crucial for a baby's healthy emotional and social development. They conducted experiments with infant rhesus monkeys, separating them from their biological mothers and providing them with substitute "mothers" made of either terrycloth or wire. The monkeys raised with terrycloth "mothers" developed significantly better both emotionally and socially compared to those raised with wire "mothers," showcasing the importance of nurturing touch and emotional connection for healthy development.