6. The theory of the degeneration of races has been set forth in particular
by Stewart Chamberlain, _Die Grundlagen des XIX. Jahrhunderts_, 3d. ed.,
Munich, 1901, pp. 296 ff.--The idea of selection by retrogression, of the
_Ausrottung der Besten_, has been defended, as is well known, by Seeck in
his _Geschichte des Untergangs der antiken Welt_, which outlines the
religious consequence (II, p. 344). His system is developed in the third
volume which appeared in 1909.
7. Apuleius, _Metam._, XI, 14 ff. See Preface. Manilius said of the divine
stars (IV, 910; cf. II, 125),
"_Ipse vocat nostros animos ad sidera mundus_."