- Peter Andreas Thiel (/tiːl/; born 11 October 1967) is an American entrepreneur, venture capitalist, and political activist. A co-founder of PayPal, Palantir Technologies, and Founders Fund, he was the first outside investor in Facebook. As of July 2024, Thiel had an estimated net worth of US$11.2 billion and was ranked 212th on the Bloomberg Billionaires Index.
- Karl Marx (plato.standford.edu)
Karl Marx (1818–1883) is often treated as a revolutionary, an activist rather than a philosopher, whose works inspired the foundation of many communist regimes in the twentieth century. It is certainly hard to find many thinkers who can be said to have had comparable influence in the creation of the modern world.