Determining the world's greatest businessperson is subjective and can vary depending on the criteria used for evaluation. However, one individual who is widely regarded as an exceptional business leader is Warren Buffett.

Warren Buffett, the Chairman and CEO of Berkshire Hathaway, is often considered one of the most successful investors and businesspeople in history. His investment philosophy and long-term approach to value investing have made him a legendary figure in the business world.

Buffett's success can be seen through the remarkable growth of Berkshire Hathaway, which started as a textile manufacturing company and transformed into a conglomerate with diverse holdings in various industries, including insurance, utilities, transportation, and more. Under Buffett's leadership, Berkshire Hathaway has consistently outperformed the market, delivering an average annual return of over 20% for its shareholders since 1965.

One of Buffett's notable achievements is his ability to identify undervalued companies and make profitable investments. His most famous investment is his purchase of shares in Coca-Cola in the late 1980s. Despite criticism at the time, Buffett's confidence in the company's brand and long-term prospects paid off tremendously. The value of Berkshire Hathaway's Coca-Cola investment has grown exponentially, making it one of their most successful holdings.

Furthermore, Buffett's philanthropic efforts are worth mentioning. In 2006, he pledged to give away 99% of his fortune to charitable causes, primarily through the Bill and Melinda Gates Foundation. Buffett's commitment to philanthropy and his efforts to encourage other billionaires to donate their wealth have had a significant impact on society.

While there are other notable businesspeople like Steve Jobs, Jeff Bezos, and Elon Musk, Warren Buffett's consistent track record, long-term success, and his ability to create value for shareholders make him a strong contender for the title of the world's greatest businessperson.

References:

1. "Warren Buffett: The Oracle of Omaha" - Investopedia (https://www.investopedia.com/university/warren-buffett-oracle-omaha/)
2. "Warren Buffett's 6 best investments of all time" - CNBC (https://www.cnbc.com/2020/05/02/warren-buffetts-6-best-investments-of-all-time.html)
3. "Warren Buffett: The making of an American capitalist" - The Guardian (https://www.theguardian.com/business/2019/jun/15/warren-buffett-the-making-of-an-american-capitalist)