From the boardrooms of Fortune 500 companies to schools and government ministries, few concepts in popular psychology travelled as far and wide as lateral thinking. Garnering in excess of 20 million readers across almost 40 countries, a BBC TV series, hundreds of paid-up and certified ‘Master Thinkers’, a network of educational and business champions, de Bono had, by the 1980s, become a peculiar type of public intellectual: one who refused to engage with critics and detractors. Criticism was, according to the father of lateral thinking and founder of the Cognitive Research Trust, a vestige of the adversarial and ‘intrinsically fascist’ Socratic method. – Aeon