In the late 1940s, when Sam Walton was franchising a Ben Franklin’s variety store in Newport, Ark., he had a simple but momentous idea. Like any retailer, Walton was always looking for deals from suppliers. Typically, though, a retailer who managed to get a bargain from a wholesaler would leave his store prices unchanged and pocket the extra money. Walton, by contrast, realized he could do better by passing on the savings to his customers and earning his profits through volume. This insight would form a cornerstone of Walton’s business strategy when he launched Wal-Mart in 1962.

Walton understood that a major requirement for keeping costs down was controlling the payroll. He said, “Payroll is one of the most important parts of overhead, and overhead is one of the most crucial things you have to fight to maintain your profit margin.” Not only did Walton prefer to hire as few people as possible, but he also feared paying them more than he had to. Unions were particularly feared, and Walton did everything he could to fight them, almost always successfully.

The company was incorporated as Wal-Mart Stores, Inc. on October 31, 1969. In 1970, it opened its home office and first distribution center in Bentonville, Arkansas. It had 38 stores operating with 1,500 employees and sales of $44.2 million. It began trading stock as a publicly held company on October 1, 1970, and was soon listed on the New York Stock Exchange. The first stock split occurred in May 1971 at a market price of $47 (equivalent to $274.00 in 2014). By this time, Walmart was operating in five states: Arkansas, Kansas, Louisiana, Missouri, and Oklahoma; it entered Tennessee in 1973 and Kentucky and Mississippi in 1974. As it moved into Texas in 1975, there were 125 stores with 7,500 employees and total sales of $340.3 million (equivalent to $1.49 billion in 2014). Walmart opened its first Texas store