One of the wealthiest entrepreneurs of the 18th century, Wedgwood created goods to meet the demands of the consumer revolution and growth in wealth of the middle classes that helped drive the Industrial Revolution in Britain. He is credited as the inventor of modern marketing, specifically direct mail, money back guarantees, travelling salesmen, carrying pattern boxes for display, self-service, free delivery, buy one get one free, and illustrated catalogues. Wedgwood is also noted as an early adopter/founder of managerial accounting principles in Anthony Hopwood's "Archaeology of Accounting Systems."