Marc Lowell Andreessen is an American businessman, the self-made billionaire Co-founder of Netscape Communications and Co-founder of Andreessen Horowitz (a16z), one of the world's most influential venture capital firms. Born in Cedar Falls, Iowa, in 1971, his career is rooted in elite computer science and technological revolution.

Andreessen graduated from the University of Illinois Urbana-Champaign (UIUC) with a B.S. in Computer Science. His structural contribution to the digital age is immense: in 1993, he co-created Mosaic, the first widely adopted web browser, which profoundly changed the Internet landscape. His philosophy centers on technological optimism, disruption, and long-term investment in software-driven platforms.

• Andreessen Horowitz (a16z) (Co-founder & General Partner): The core private asset, a dominant venture capital firm specializing in technology, crypto (Web3), and AI.
• Netscape Communications (Co-founder): The company that commercialized the web browser and is credited with launching the Internet boom of the 1990s (sold to AOL for $4.2 billion).
• Browser Inventor: He co-created Mosaic, the first graphical web browser (a fundamental piece of Internet history).
• Controversy: His investment firm, a16z, is often criticized for its large-scale crypto advocacy and disruptive political stances (e.g., YIMBY movement).

Marc Andreessen's strategic genius was his ability to commercialize fundamental technology. 1994: Netscape. He co-founded Netscape with Jim Clark, which had its IPO in 1995 (a landmark event that signaled the Internet's arrival on Wall Street). 2009: a16z. He co-founded Andreessen Horowitz with Ben Horowitz, pioneering a new full-stack VC model that offered startups extensive operational advice and talent resources (managing billions in assets).

His structural contribution is tied to pioneering the web browser, the Internet boom, and innovating the venture capital model. He remains a powerful voice in the technology and crypto sectors. His wealth is secured by the colossal capital gains from his tech ventures and his long-term equity in a16z.

Marc Andreessen's social impact is structural, stemming from his invention of the web browser, which democratized Internet access globally. His a16z firm funds disruptive technology that influences global commerce, health, and communication. His personal philanthropy supports various educational and community initiatives (including UIUC).

His structural contribution is tied to his belief in technological acceleration (as detailed in his famous essay: 'Why Software Is Eating the World'), influencing venture capital strategy globally.

Marc Andreessen maintains the casual, high-IQ style of a technology executive. His attire is consistently pragmatic, favoring dark T-shirts and business casual wear. His aesthetic reflects intellectual authority, disruption, and immense wealth.

Residing in Palo Alto, California, his luxury is the immense security and financial reward derived from his multi-billion dollar fortune. His life is dedicated to venture creation, technology investment, and advocating for a decentralized, software-driven future.