Herbert Muggleton Stanley was the guiding genius behind the invention and development of novel chemical processes at the former Central Research Department of the Distillers Company Limited (DCL) at Epsom. He had an unerring eye for new and cheaper routes to major chemical intermediates and to monomers for the plastics industry. Once convinced of the feasibility and economic desirability of a potential new process he would steer it to a successful conclusion with great determination. By his quiet but inspirational leadership he built up a highly motivated and fully integrated research department. His success was manifested, even before his retirement, in worldwide major petrochemical plants, operating processes the inception of which he had nurtured . As the Public Orator at Exeter University said of him, ‘ He was one of the makers of the modern world.’ This memoir describes successively Stanley’s school and university years and then proceeds to a general account of the progress of chemicals research in DCL, with which he was so intimately connected. After a comment on Stanley as man and manager his industrial career is returned to in more technical detail. In conclusion, the active life he led in retirement is outlined. .