What is Kardashev scale, which Kamath cited to say humans still like 'cavemen with fire'?
Elon Musk and Nikhil Kamath, during the latter's podcast, talked about the Kardashev scale, used to measure progress of civilisations based on how they consume energy. The scale's three levels, planetary, stellar and galactic, depend on what percentage of Earth, Sun and galaxy's energy humans use. Kamath's podcast noted humans rank 0.73 on the scale, equivalent to "cavemen with fire".