Marc Andreessen co-created Mosaic and co-founded Netscape, giving him the rare perspective of having built one of the first mainstream web browsers before becoming a top-tier VC, which anchors his investing approach toward platform-level technologies rather than incremental products. He originated the widely cited thesis "Why Software Is Eating the World" and authored the "It's Time to Build" manifesto, positioning him as both an investor and public advocate whose written frameworks on software, building, and technology are widely circulated in founder communities. Marc Andreessen co-created Mosaic and co-founded Netscape, giving him the rare perspective of having built one of the first mainstream web browsers before becoming a top-tier VC, which anchors his investing approach toward platform-level technologies rather than incremental products. He originated the widely cited thesis "Why Software Is Eating the World" and authored the "It's Time to Build" manifesto, positioning him as both an investor and public advocate whose written frameworks on software, building, and technology are widely circulated in founder communities.