Answer:
The study of human behaviour has found many practical uses in society. Among them are using it to help depressed people, using it to solve social akwardness, using it to solve crime by predicing criminals (Behavoural Analysis Unit of the FBI for example, in the Royal Canadian Mounted Police they have profilers that use human behaviour to help capture criminals), they have used it to see why people are socially awkward, to define and help people with hundreds if not housands of dissorders and psychological syndromes (Post-Trauamtic Stress Disorder, Attention-Deficit Dissorder, Hyperactive Attention-Deficit Dissorder, Stockholm Syndrome, Split Personality Dissorder, Asperger's Syndrome, ect.,), and many many otyher uses. It has even been used to help figure out why people turn out how they do, and explain human actions, therefore helping prevent un-wanted human actions such as murder.