On 1 September 1967, the Nobel Prize-winning civil rights leader Martin Luther King Jr. delivered a speech entitled ‘The role of the behavioral scientist in the civil rights movement’ to the American Psychological Association (APA, 1999; King, 1968). With eloquence and passion, Martin Luther King championed the civil rights struggle and spoke to the interests of his audience. He stressed how behavioural scientists could and should support the civil rights movement. King’s eloquent and passionate speech is still relevant today – explaining how psychologists and other mental health professionals could help address today’s pressing social issues.