The pus collection causes pressure on the spinal cord. The infection is usually due to bacteria. Often it is caused by a staphylococcus infection that spreads through the spine. It may be caused by tuberculosis in some areas of the world, but it is not as common today as it was in the past.
From the 1830s until 1870, the abolitionist movement attempted to achieve immediate emancipation of all slaves and the ending of racial segregation and discrimination.
The abolitionist movement, which was international in scope, sought to end slavery. This was considered a moral undertaking and among the leading forces in the US were the Quakers, Congregationalists, Unitarians, and Methodists.