The law of syntropy stems from the equations that combine special relativity with quantum mechanics. These equations have a dual solution: one that describes positive energy that diverges from past to future, and one that describes negative energy that diverges backwards in time from the future to the past. The negative solution had been rejected by physicists because it was considered impossible, but in 1941 the mathematician Luigi Fantappiè realized that while the positive solution is governed by the law of entropy (en=diverging, tropos=tendency), the negative solution is governed by a symmetrical law which Fantappiè named syntropy (syn=converging, tropos=tendency). For us, that we move forward in time, syntropy describes energy that concentrates and leads to increase differentiation, complexity, structures and order. Fantappiè noticed these properties in living systems and came to the conclusion that Syntropy is the energy of life and that life is moved by final causes. The extension of science to syntropy is well described by Fantappiè in this letter to a friend:


"As a consequence of conversations with two colleagues, a physicist and a biologist, I was suddenly projected in a new panorama, which radically changed the vision of science and of the Universe which I had inherited from my teachers, and which I had always considered the strong and certain ground on which to base my scientific investigations. Suddenly I saw the possibility of interpreting a wide range of solutions (the anticipated potentials) of the wave equation which can be considered the fundamental law of the Universe. These solutions had been always rejected as “impossible”, but suddenly they appeared “possible”, and they explained a new category of phenomena which I later named “syntropic”, totally different from the entropic ones, of the mechanical, physical and chemical laws, which obey only the principle of classical causation and the law of entropy. Syntropic phenomena, which are instead represented by those strange solutions of the “anticipated potentials”, should obey two opposite principles of finality (moved by final causes placed in the future, and not by causes placed in the past) and differentiation, and should be non-causable in a laboratory."