Big History

William Henry Gates III is an American businessman and philanthropist. A pioneer of the microcomputer revolution of the 1970s and 1980s, he co-founded the software company Microsoft in 1975 with his childhood friend Paul Allen. Following Microsoft's initial public offering in 1986 and the subsequent increase in its stock price, Gates became the world's then-youngest billionaire in 1987, at age 31. Forbes magazine ranked him as the world's wealthiest person for 18 out of 24 years between 1995 and 2017, including 13 years consecutively from 1995 to 2007. Gates became the first centibillionaire in 1999, when his net worth briefly surpassed US$100 billion. According to Forbes, as of February 2026, his net worth stood at US$107.7 billion, making him the 18th-wealthiest individual in the world.

Israeli historian and author of popular science bestsellers

American geologist

1980 non-fiction work by Carl Sagan

academic discipline which examines history from the Big Bang to the present

non-fiction work by Carl Sagan

popular science book by Elizabeth Kolbert

American historian

educational channel on YouTube

Wikipedia index article

American historian (born 1938)

project for global teaching of Big History

Australian-American historian

Russian academic