George's statement that "there are no men and ... no women; there are only sexual majorities"[p.61, op. cit.] has been widely quoted. The feminists, he adds, "base themselves on Weininger's theory, according to which the male principle may be found in woman, and the female principle in man." Unfortunately, George does not make clear what he means by "principle," so his theory, if he has one, is impossible to appraise in biological terms. From the embryonic idea expressed above, he deduces a very positive social philosophy of sex. The feminists, he says, "recognize no masculine or feminine '_spheres_' and ... propose to identify absolutely the conditions of the sexes." So, while George seems to think much more highly of women than does Weininger, their philosophies come together, for quite different reasons, on the practical procedure of disregarding reproduction and letting the race go hang[10, p.345]. Weininger seems to recognize the dual basis for sex; George evidently does not quite follow him. Both entirely misconceived the real issues involved, as well as the kind of evidence required to settle them, as we shall see later in discussing adaptation and specialization. Dr Blair Bell[14,15] has collected a mass of evidence on intersexes in the human species. This includes his own surgical and other cases, as well as many treated by his colleagues, and a very considerable review of the medical literature. He not only believes in degrees of femininity in women, but has worked out classifications which he claims to have found of great practical value in surgery.[14, pp.166-7] As noted above, Riddle discovered that his more feminine female pigeons were often killed by a dose of testicular extract which was practically harmless to a partially masculinized female. Sex in the human species being a matter of all the glands organized into a complex, the quantitative "strength" of that complex would be useful to know before removing any one secretion from it. Dr Bell states that the oöphorectomy operation (removal of ovaries) may be performed upon a masculine type of woman with "little disturbance of the metabolism..." But he thinks that the degree of masculinity should always be carefully observed before undertaking such operations, which in some cases have most undesirable effects.