Clinical psychology is concerned with the treatment of mental health issues. This dynamic and deeply impactful field is dedicated to understanding, diagnosing, and treating mental, emotional, and behavioural disorders. Clinical psychology formally emerged in the late 19th and early 20th centuries, with key figures such as Lightner Witmer, who founded the first psychological clinic in 1896 and is often regarded as the father of clinical psychology. Psychotherapy could be said to have originated with Sigmund Freud in the early 1900s. Freud, the originator of psychoanalysis, was an early pioneer of ‘talking therapy.’ These two expressions of psychological ‘people-helping’ have grown to encompass a range of specialised approaches, including person-centred therapy, advanced by Carl Rogers in the 1940s and 1950s, existential therapy (Irvin Yalom), transactional analysis (Eric Berne), and cognitive-behavioural therapy (CBT), pioneered in part by Aaron Beck in the 1960s. Today, psychotherapists and clinical psychologists work across hospitals, schools, private practices, and research institutions, addressing everything from anxiety and depression to trauma and substance abuse. This work can not only transform individual lives, helping people find clarity, resilience, and hope, but also strengthen communities by promoting mental wellness, reducing stigma, and guiding evidence-based policy. As the need for emotional health becomes ever more recognised, these specialisms stand as both a beacon of healing and a pillar of societal wellbeing.