Doug McMillon (IG: @dougmcmillon) is president and chief executive officer of Walmart, a company that, if it were a country, would be the 25th largest economy in the world. Walmart serves 265 million customers weekly in 27 countries across more than 11,000 stores and online, and the company employs roughly 2.2 million associates worldwide, which would equate to the second largest army in the world (behind China) if it were tasked with defending that 25th largest economy. 75 percent of Walmart’s store management team began as hourly associates, and Doug is no exception. He started out in 1984 as a summer associate in the Walmart distribution center, and in 1990 while pursuing his MBA, he rejoined the company as an assistant manager in Tulsa before moving to merchandising as a buyer trainee. He worked his way up, and from 2005 to 2009 he served as president and CEO of Sam’s Club (owned and operated by Walmart) with sales of more than $46 billion annually during his tenure. From February of 2009 to 2014, Doug…