Discuss the emancipation of the slaves and how the executor of a will, such as General Lee, would have been responsible for carrying out the conditions of that will.
No Lee did not.   The WILL required a freeing of the slaves 5 years after the death of MR Custis and they were freed at that point.   Lee would have been in direct violation of his fiduciary responsibility as executor had he failed to carry out what was in the will.   That pesky rule of law bites leftists like yourself in the butt every time.