This article touches a bit on the history:
http://www.catholicnewsagency.com/r...icles-and-addresses/an-ex-abortionist-speaks/
"We persuaded the media that the cause of permissive abortion was a liberal enlightened, sophisticated one. Knowing that if a true poll were taken, we would be soundly defeated, we simply fabricated the results of fictional polls. We announced to the media that we had taken polls and that 60% of Americans were in favor of permissive abortion. This is the tactic of the self-fulfilling lie. Few people care to be in the minority. We aroused enough sympathy to sell our program of permissive abortion by fabricating the number of illegal abortions done annually in the U.S. The actual figure was approaching 100,000 but the figure we gave to the media repeatedly was 1,000,000. Repeating the big lie often enough convinces the public. The number of women dying from illegal abortions was around 200 - 250 annually. The figure constantly fed to the media was 10,000. These false figures took root in the consciousness of Americans convincing many that we needed to crack the abortion law. Another myth we fed to the public through the media was that legalizing abortion would only mean that the abortions taking place illegally would then be done legally. In fact, of course, abortion is now being used as a primary method of birth control in the U.S. and the annual number of abortions has increased by 1500% since legalization."