General Electric was founded in 1878 by Thomas Edison and initially focused on electricity generation and distribution. Under the leadership of CEO Jack Welch from 1981 to 2001, GE underwent major restructuring and cultural changes. Welch decentralized decision making, instituted a system of strategic business units, and emphasized developing world-class operations. He challenged managers and employees to be "better than the best" and oversaw hundreds of acquisitions and divestitures. Welch also introduced new strategic initiatives like Six Sigma quality improvement and growing service businesses to diversify beyond industrial products. By the end of his tenure, Welch had transformed GE into one of the world's largest and most profitable companies.