We are, indeed, far from asserting that the civilisations of the past which have decayed, have decayed alone through the parasitism of their females. Vast, far-reaching social phenomena have invariably causes and reactions immeasurably too complex to be summed up under one so simple a term. Behind the phenomenon of female parasitism has always lain another and yet larger social phenomenon; it has invariably been preceded, as we have seen, by the subjugation of large bodies of other human creatures, either as slaves, subject races, or classes; and as the result of the excessive labours of those classes there has always been an accumulation of unearned wealth in the hands of the dominant class or race. It has invariably been by feeding on this wealth, the result of forced or ill-paid labour, that the female of the dominant race or class has in the past lost her activity and has come to exist purely through the passive performance of her sexual functions. Without slaves or subject classes to perform the crude physical labours of life and produce superfluous wealth, the parasitism of the female would, in the past, have been an impossibility. There is, therefore, a profound truth in that universal saw which states that the decay of the great nations and civilisations of the past has resulted from the enervation caused by excessive wealth and luxury; and there is a further, and if possible more profound, truth underlying the statement that their destruction has ultimately been the result of the enervation of the entire race, male and female.