Born in Vienna, Austria, Capra earned a Ph.D. in theoretical physics from the University of Vienna in 1966. He has done research on particle physics and systems theory, and has written popular books on the implications of science with ethics, metaphysics and society. In particular in "The Tao of Physics" he makes the assertion that physics and metaphysics are both inexorably leading to the same knowledge. His works all share a similar subtext: that ""there are hidden connections between everything"". Capra is both a Buddhist and a Catholic Christian. 