The answer is 130 million books have been written
It was a bill that divided the Kansas and Nebraska territory into 2 parts and allowed settlers in each territory to decide whether or not to allow slavery. Lincoln asserted that slavery should not spread to new territories. Lincoln didn't want slavery at all.
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Thirty years ago, a wave of optimism swept across Europe as walls and regimes fell, and long-oppressed publics embraced open societies, open markets and a more united Europe. Three decades later, a new Pew Research Center survey finds that few people in the former Eastern Bloc regret the monumental changes of 1989-1991. Yet, neither are they entirely content with their current political or economic circumstances. Indeed, like their Western European counterparts, substantial shares of Central and Eastern European citizens worry about the future on issues like inequality and the functioning of their political systems.