What key concept did B.F. Skinner emphasize about behavior?

B.F. Skinner emphasized that behavior is learned and modified through consequences, which is a fundamental principle of his operant conditioning theory. This theory posits that behaviors can be shaped through reinforcement and punishment. When a behavior is followed by a favorable outcome (reinforcement), it is more likely to be repeated in the future. Conversely, when a behavior results in an unfavorable outcome (punishment), it is less likely to occur again. This perspective highlights the importance of environmental influences and consequences in shaping behavior, suggesting that behaviors are not simply innate or unchangeable but can be significantly altered based on the feedback individuals receive from their environment. Skinner's work underscores the potential for behavioral change throughout an individual's life, driven by the systematic application of rewards and consequences.