Abraham Lincoln's anti-slavery argument applied analogously to abortion — differences do not justify denying rights

Mike draws an explicit parallel between pro-slavery arguments of Lincoln's era and contemporary pro-choice arguments. In both cases, real differences (color, intellect, location, size, development) are used to justify denying the rights of the weaker party. Mike quotes Lincoln's reductio ad absurdum against the slavery argument: 'You say A is white and B is black. It is color, then; the lighter having the right to enslave the darker... You do not mean color exactly; you mean the whites are intellectually the superior of blacks... But say you, it is a question of interest; and if you can make it your interest, you have the right to enslave another. Very well. And if he can make it his interest, he has the right to enslave you.'