Roblox – a metaverse where tens of millions of people play together every day – started with a game David Baszucki built with his brother called Interactive Physics. The two formed – and later sold – a gaming company, Knowledge Revolution, which sold millions of copies of that game. Baszucki then began work on an evolution of the same idea – with the late Eric Cassell – that eventually became Roblox. In 2021, Baszucki launched a philanthropic organization, which has funded research, so far, into COVID-19, bipolar disorder, and lymphoma.