 Several ways of modifying Newtonian gravity to make it compatible with the spacetime structure of STR suggested themselves to physicists in the years 1905–1912, and a number of interesting Lorentz-covariant theories were proposed (i.e., theories compatible with the spacetime of STR, which is called ‘Minkowski spacetime’ because Hermann Minkowski first revealed the spacetime structure that Einstein’s postulates in STR entail). Einstein rejected these proposed theories one and all, for violating either empirical facts or theoretical desiderata. But Einstein’s chief reason for not pursuing the reconciliation of gravitation with STR’s spacetime appears to have been his desire, beginning in 1907, to replace STR with a theory in which not only velocity could be considered merely relative, but also acceleration. That is to say, Einstein wanted if possible to completely eliminate all absolute quantities of motion from physics, thus realizing a theory that satisfies at least one kind of ‘strict’ relationism. (Regarding Einstein’s rejection of Lorentz-covariant gravity theories, see Norton 1992; regarding Einstein’s quest to fully relativize motion, see Hoefer 1994.)