On this day in economic and business history...

The first Wal-Mart (NYSE:WMT) opened its doors in Rogers, Arkansas on July 2, 1962. 

At this point in his life, Wal-Mart founder Sam Walton had already racked up over two decades of experience as a retailer. He got his start in the industry as a management trainee in one of J.C. Penney's (OTC:JCPN.Q) Iowa stores in 1940. Penney's focus on maximizing the value of a customer's visit goes a long way toward explaining Walton's lifelong obsession with making his own store experiences better through research and observation.

Five years later, Walton purchased his first store, a Ben Franklin five-and-dime in Newport, Arkansas with a $20,000 from his father-in-law. Walton took the unprofitable Ben Franklin and turned it into that company's biggest success in Arkansas, learning along the way that lower prices and proper in-store marketing techniques can make a world of difference in the brutally competitive retail industry.

Walton was forced to move on to another Ben Franklin in 1951 after losing his lease on the first store. This one was rechristened the Walton 5 and 10, and its location -- in Wal-Mart's current corporate headquarters of Bentonville -- has informed the Wal-Mart focus on small-town communities ever since. Today it serves as a Wal-Mart corporate museum:

Source: Jonathan Babin via Flickr .

Walton became Ben Franklin's largest franchisee by 1962, with 16 stores scattered across Kansas, Arkansas, and Missouri. At this point, he was convinced that a larger retail footprint would better serve his small-town customer base, and the first Wal-Mart opened in Rogers with twice the space of his original 5 and 10. Here's how Walton himself described that first store in his autobiography: 

The store was only 12,000 square feet, and had an eight-foot ceiling and a concrete floor, with bare-boned wooden plank fixtures. Sterling [a competitor] had a huge variety store in downtown Harrison, with tile on the floor, nice lights, really good fixtures, and good presentations. Ours was just barely put together -- highly promotional, truly ugly, heavy with merchandise -- but for 20% less than the competition. We were trying to find out if customers in a town of 6,000 people would come to our kind of a barn and buy the same merchandise strictly because of price. The answer was yes.

Wal-Mart was one of three discount retail giants that began operating that year -- the first Kmart opened in March of 1962, and the first Target opened in Minnesota that May. Wal-Mart grew quickly, and within five years it had expanded to 24 stores posting a cumulative $13 million in annual sales. However, since both of Wal-Mart's major discount competitors were originally new brands of established retailers, they got off to faster starts. Target's parent company went public in 1967 with nearly 20 times Wal-Mart's annual sales, and Kmart -- now part of Sears Holdings (NASDAQ:SHLDQ) -- had opened 10 times as many locations as Wal-Mart by that point in time. But Wal-Mart was only getting started.

By 1970, Wal-Mart had expanded to 38 locations and was generating over $44 million in annual sales, but mounting debts made further expansion difficult. Walton took the company public that fall, retaining 61% ownership and raising enough cash to expand to 51 stores within the next two years. These shares went on to become one of the absolute best investments anyone could make over the past 50 years. Since their first day on the market, Wal-Mart shares have gained over 900,000% -- not including any reinvested dividends.

The 1980s were the decade when America woke up to Wal-Mart. The company ended the 70s with 276 stores and 21,000 employees, reaching $1 billion in annual sales after what was then a record-breaking 17 short years of operation. In 1983, Wal-Mart opened its first Sam's Clubs, the massive supercenters named after Wal-Mart's founder. That year would mark the dawn of the warehouse-club retail era just as 1962 marked the beginning of discount retailing -- Costco (NASDAQ:COST) also opened its first store in 1983, and would later undermine Sam Walton's efforts to grow in that sector by merging with Price Club, a warehouse chain that Walton had wanted to add to his own corporate empire.

Despite this setback, Wal-Mart could not be stopped. By 1985, Walton's $3 billion fortune made him the richest man in America. The press coverage of Walton rankled him so much that his autobiography brought up the offense he felt at being painted as "a really cheap, eccentric recluse, sort of a hillbilly who more or less slept with his dogs in spite of having billions of dollars stashed away in a cave." By the end of the decade Wal-Mart became the first retailer to ever post after-tax profits of over $1 billion, finally passing Kmart as the nation's most profitable retailer. Wal-Mart ended the 80s with over 1,400 stores in 26 states.

Source: Member uacescomm on Flickr, cropped for focus. 

Wal-Mart began expanding internationally in 1991, but the following year, Sam Walton died of bone cancer, leaving his immense fortune to several heirs. The total wealth of those heirs has since swelled past the $110 billion mark, leading to criticism from the media over the fact that one family controls as much wealth as the poorest 40% of all American families, representing nearly 49 million households. The average Wal-Mart hourly worker would need to work for seven million years to earn as much money as the Walton heirs.

Wal-Mart continued to grow rapidly despite the loss of its founder. A year after Walton's passing, the company recorded its first-ever week of $1 billion in companywide sales. Sales doubled to over $100 billion by 1997, the same year that the company's leading position among American retailers earned it a spot on the Dow Jones Industrial Average (DJINDICES:^DJI). Wal-Mart became the Dow's only consumer retail company after Sears' removal two years later, and has remained so to the present day. Wal-Mart became the largest company in America by revenue in 2002, with $220 billion in annual sales. In the decade that followed, Wal-Mart again doubled its annual revenue, and it looks set to become the first company in American history to generate half a trillion dollars in annual sales within the next few years.

TIME honored Wal-Mart's 50th anniversary in 2012 with a list of 10 ways the company changed the world. In brief, the 10 big changes are:

  • Everyday low prices (no sales, just bargains) in retail.
  • An immense selection of stuff under one roof.
  • The retail landscape (promoting suburban sprawl).
  • The decline of American labor and the acceptance of workforce abuse.
  • Retail's integration and coordination with supply chain partners.
  • The "corporate culture" as a means of systemic management.
  • The use of data to manage retail processes and adapt to consumer trends.
  • A culture of conspicuous overconsumption.
  • The use of sustainable (green) business practices as a way to save money.
  • Making globalization work for businesses through accessibility.

Here's a visual representation of Wal-Mart's impressive growth over the years, created by statistician Nathan Yau of FlowingData:

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.