  The phenomenon of gravity—as explained by “Mr. Newton’s incomparable book”(ibid.)—has apparently led Locke to abandon the contact action proviso and to attribute to matter the power of acting distantly, even though the process by which such interactions could occur is so obscure that he is driven to invoking superaddition. This is the prevailing interpretation of Locke (given by Leibniz for one, who targeted Locke for it in Against Barbaric Physics), though not all commentators agree, as indicated in a subsequent section.