Marc Andreessen is a prominent American entrepreneur, venture capitalist, and software engineer who played a foundational role in the early development of the World Wide Web. He first gained fame as the co-creator of Mosaic, the pioneering graphical web browser, before co-founding Netscape Communications and several other successful technology companies. Currently, he serves as a general partner at the influential Silicon Valley firm Andreessen Horowitz, where he oversees a massive portfolio including major investments in cryptocurrency, artificial intelligence, and social media. Beyond his business ventures, Andreessen is a vocal techno-optimist whose shifting p ...