Both Bobbi Brown and Eugene Schueller started groundbreaking cosmetics companies, with Brown founding her eponymous makeup line that focused on natural looks in 1991 and Schueller founding L'Oreal in 1907 after developing hair dye formulas as a chemist. While Brown drew on her experience as a makeup artist to create accessible beauty products for women, Schueller's invention of hair dyes and expansion into other cosmetics through research and development demonstrated an entrepreneurial spirit. These founders revolutionized the cosmetics industry through innovative products and business models that have withstood the test of time.