Alexey Grishin

The author explores the roots of the Stoic concept which anticipated Newton’s gravitation law. The central problem of the paper was outlined but not solved in previous studies on Stoic physics. To solve it one has to explain the contradicting data of Stoic physics, partly ascribing to the light elements the primary movement downwards and partly upwards. It is argued that the concept of the light elements’ moving upwards could have developed in the Stoic philosophy not only under Aristotle’s influence, because centrifugal tendencies of fi re and air (with commentators could easily reinterpret as movement upwards) were necessary for the functioning of the so-called pneuma. The results achieved are extrapolated by the author to the ethic and logic parts of the doctrine: primary movements stay mostly unrealized, but the very tendency of elements to realize them is necessary for the integrity of the world (on the logical level for sustaining cause-andeffect chains). That is why a man has to aim at what he is inclined to by nature, whatever the possibility of achieving his aims.