That’s not really true, I don’t think. In fact, that was Stephen Douglas’s position, that a territory should be allowed to vote to allow slavery or make it illegal, and that was one of the main reasons that the Southern Democratic delegates to the convention wouldn’t endorse Douglas. (In fact, they walked out of the convention, and nominated a second candidate.) THe majority position among Southern Democrats at the time was that slavery couldn’t be outlawed in a state or a territory, either by state or federal action, and that any such ban would be unconstitutional.
I also don’t think I’d characterize the Emancipation Proclamation as purely a political gesture. It certainly was done partly for political reasons…doing it hurt the south diplomatically, and helped Lincoln politically in New England, but it also had soime serious political costs. In fact, some historians think that the Proclamation was the reason the Republicans lost seats in Congress during the 1862 election. And there was a moral calculus too. Lincoln was known to comment privately on the moral rightness of the Proclamation, and he confessed to friends that it was a grave responsibility to be the deliverer of freedom to an entire race.
As for Reeder’s comment:
That’s obviously untrue. William Wilberforce, the strongest voice behind the abolition of slavery in Britain, was an evangelical Christian, and part of the Clapham Sect, as was Granville Sharpe, who was probably the second strongest voice behind the abolition of slavery in Britain.
In America Amos Phelps, a prominent member of the Antislavery Society, was a Congregationalist minister, as was Henry Ward Beecher, another prominent American abolitionist. This of course, isn’t counting people like Samuel Cornish, who were African American ministers involved in abolitionism. I’d also point out to you that the Society of Friends (Quakers) banned slaveholding among its members, and were outspoken opponents to it, as did the Baptist and Methodist churches in the north.
And if you want to look at today, instead of the past, groups like the American Antislavery Group and Christian Solidarity International, are active against slavery in Sudan and Burma, as well as sexual slavery worldwide. The second group is avowedly Christian, and the first has a good deal of support from Christian churches.