The Ratio Club was an informal, interdisciplinary discussion group based in London, fostering early cybernetics research and thought in post-war Britain. Its unique culture centered on regular, private meetings where members from diverse fields—mathematics, physiology, engineering, philosophy—could freely exchange ideas and critique emerging concepts in cybernetics, information theory, and artificial intelligence. This informal, collaborative environment, free from institutional constraints, allowed for speculative and experimental discourse that significantly influenced the nascent field.

Operating during a pivotal period of scientific advancement, the club served as a crucial intellectual melting pot. It connected individuals who would later become prominent figures, enabling a collective exploration of complex systems and the potential of computation. The very act of convening such varied minds, without a formal agenda or institutional backing, created a 'scenius' where foundational theories and approaches to understanding control and communication in living organisms and machines could flourish.