Final answer:
Fritz Heider came up with the balance theory of attitude, which suggests that individuals strive for consistency in their thoughts, feelings, and behaviors. According to the theory, people seek to restore balance when there is inconsistency in their attitudes.
Step-by-step explanation:
The balance theory of attitude was developed by Fritz Heider, a social psychologist. Heider proposed that individuals strive for consistency in their thoughts, feelings, and behaviors, and that imbalances in their attitudes create tension. According to balance theory, people prefer to have harmonious relationships and will seek to restore balance if there is inconsistency between their attitudes toward different objects or people.