Would you be enticed to believe that your consciousness plays virtually no part in your actions, or that the process behind your decision-making is really no different than that of animals? If not, behaviorism might not explain your preferred theory of psychology. Behaviorism entails a branch of psychology comprised of the notion that virtually all behavior is through conditioning.
Behaviorism has its roots in Russian psychologist Ivan Pavlov's research on stimuli regarding dogs' salivary glands. This paved the way for psychologist John B. Watson to assert that our behaviors can essentially be reduced to a pattern of stimuli and responses; everything is the result of conditioning. Watson is perhaps best known for his "Little Albert experiment," by which he conditioned an eight-month-old child to cry upon viewing a white rat by striking a hammer against a steel bar upon the rat's appearance. Many have taken issue with the ethical questions of such an experiment, but Watson was always known as a radical, even earning the nickname "the animal man" for his comparison of animal behaviors to humans.
Other significant contributors to the behavioral field include E.L. Thorndike, who primarily studied the way animals escape from cages, and B.F. Skinner, an extremely influential psychologist for his idea of reinforcement as it relates to sustaining certain stimuli.
Generally, behaviorists are determinists; they believe that actions are predictably the result of past environmental experiences. While most would like to believe they have more control over their actions, one should think about the comic posted below. After all, I know I would stop robbing banks if someone promised me ice cream in return.