Several psychological tendencies emerged in the latter few decades of the twentieth century, and they have continued into the twenty-first. Psychology has its origins in nineteenth-century physiology, and psychologists have long been fascinated by the brain-behaviour link. Darwinian thought has always been critical in psychology (for example, it forms the foundation of functionalist thinking). Still, in recent years, a new sub discipline called evolutionary psychology has emerged, employing evolutionary concepts to explain various human behaviours. The advancement of high-frequency computer capability has had and will endure to impact psychological study significantly. As the twentieth century came to a close, psychology had grown more specialised and, as a result, more fragmented—cognitive neuropsychologists, school psychologists, and industrial psychologists seemed to have nothing in common. This trend toward specialisation will undoubtedly continue, but it's crucial to realise that all psychologists have one thing in common: their background. This article begins with a review of psychology in the twenty-first century and finishes with a discussion of psychology's future by looking at current uses.