This philosophy is a mixture of Freud, Plato, Aristotle, Darwin, Marx and many others.
Man has no natural enemies so he breeds uncontrollably. The artificially created, industrialized world has developed to the stage where it can support the meek of society; cripples, chronically sick, blind and deaf people, etc. Further these people are allowed to breed more cripples, chronically sick, blind and deaf "Useless Eaters" who would have died out in a natural environment and because of this situation, the human race is systematically weakened through enlarging numbers of useless eaters across the world. It has therefore become necessary to control the numbers of the so called "useless eaters" in order for the human race to remain strong and survive. It is important to note that one finds "Useless Eaters" amongst all nations. Race and nationality is of little importance here.