SANGER AND EUGENICS

Margaret Sanger was the founder of Planned Parenthood and thus an object for attack by the social conservatives.  Sanger did believe in eugenics, though not to the extent that social cons claim.  Here's some evidence from a PBS' American Experience show titled The Pill:

Eugenics and Birth Control
Margaret Sanger's birth control movement and quest for the Pill intersected the rise of the eugenics movement in America. At a time when birth control was still not publicly accepted in American society, some eugenicists believed birth control was a useful tool for curbing procreation among the "weak." In the 1920s and 30s, Sanger calculated that the success of the eugenics idea gave her own movement legitimacy, and tried to ally her cause with the movement. Eugenics was a dominant theme at her birth control conferences, and Sanger spoke publicly of the need to put an end to breeding by the unfit. In 1920 Sanger publicly stated that "birth control is nothing more or less than the facilitation of the process of weeding out the unfit [and] of preventing the birth of defectives."

What Did Sanger Believe?
Sanger's relationship with the eugenics movement was complex -- part strategy and part ideology. Many historians now believe that Sanger opposed eugenics along racial lines. Furthermore, Sanger opposed the belief of many eugenicists that poverty was hereditary, asserting instead that poverty, criminal behavior and other social problems were due to environmental factors and were not predetermined.

Sanger was a small part of the eugenics movement and certainly among the least objectionable. In part, she was a product of her times, as can be seen from this excerpt from the "Civilization" article from the famed 1911 edition of ther Encyclopedia Brittanica:

Equally obvious must it appear to the cosmopolite of some generation of the future that quality rather than mere numbers must determine the efficiency of any given community. Race suicide will then cease to be a bugbear; and it will no longer be considered rational to keep up the census at the cost of propagating low orders of intelligence, to feed the ranks of paupers, defectives and criminals. On the contrary it will be thought fitting that man should become the conscious arbiter of his own racial destiny to the extent of applying whatever laws of heredity he knows or may acquire in the interests of his own species, as he has long applied them in the case of domesticated animals . The survival and procreation of the unfit will then cease to be a menace to the progress of civilization . It does not follow that all men will be brought to a dead level of equality of body and mind, nor that individual competition will cease; but the average physical mental status of the race will be raised immeasurably through the virtual elimination of that vast company of defectives which to. day constitutes so threatening an obstacle to racial progress .