A socio-political concept that involves taking resources from white people as payment for a crime they did not commit and giving these resources to black people who where not the victims of the crime. Slavery reparations involves a number of unique philosophical concepts that have no legal precedent. First, the premise that guilt is not only inherited by skin color but is collectively distributed - that is, all members of the white race should pay for what a very small proportion actively engaged in (the slave trade). Second, it employs the novel concept that the right to compensation is also inherited by skin color and collectively distributed - that is, all black people will get money, whether or not their ancestors were slaves. Third, it violates a concept within most legal systems called the Grandfather clause, which basically states that one cannot be made into a criminal simply by changing the law and redefining legal behavior as criminal behavior.
Slavery reparations is a misguided attempt at alleviating white guilt and black frustration. It is misguided for many reasons, the first of which is that monetary payments cannot change the past, and will have only a marginal impact upon the future of blacks as a race. It will be a big insult for whites, however, who will be angry at having payment extorted for a crime they did not commit. Blacks who are angry will not be pacified by putting a price on the lives & suffering of their (supposed) ancestors. Finally, let's face it, quality of life is better in America - their payment is that they are here and not in Botswana, Rwanda or Sudan, where they would be starving, living in fear and without basic amenities such as clean water and the rule of law.
The true beneficiaries will be lawyers (who will take their 50% of the haul, laughing all the way to the bank) and politicians who can say (mistakenly) that they are champions of the black cause because they championed reparations.
Long ago, black Africans enslaved their fellow blacks so they might sell them to white slavers, who would bring them to America. As time went by, whites felt guilty about enslaving their fellow man and abolished slavery in numerous Western socities. In America it came by force during a Civil War, during which many white soldiers died defeating a government that permitted slavery. Blacks were freed, although not considered fully human by some laws. As time went by, laws of equality were passed. The lot of blacks in America improved and their middle class swelled, but they were still not equal. So rather than be thankful for the progress that they have made and are making, some blacks choose to slap their white liberators and societal benefactors by seeking slavery reparations.