Jacob Lund Fisker was born in Denmark in 1975. He got his first computer when he was 12 and subsequently trained himself to sit in front of a screen for up to 16 hours a day. This was good preparation for what was later to come. At 24, he moved to Switzerland and spent 4 years researching certain details of neutron star physics which are immensely interesting to about five people in the world. During that time he became interested in strategic resource shortages and ran a very popular website on peak oil. He also became a bit of an anticonsumer. After getting a PhD in theoretical physics, he worked as a researcher for another five years while giving talks at places like CERN, Princeton, Los Alamos, Notre Dame, etc. Having saved most of his income he found himself financially independent at 30. A couple of years later he started a blog on earlyretirementextreme.com to show others the way to financial freedom.