The morality of today is certainly much different from the morality of the past. Imagine the absurdity of a time in which the average person thought slavery was an acceptable economic strategy, a reality of the past (and the present in some parts of the world). This is an unsettling thought, but it shows how our morality is progressive and not absolute. It changes over time, and we can make it change for the better.
I prefer this type of morality. I want to ask the right questions, and learn the best answers. There was a time when people could be considered property. Aren’t we glad someone questioned that? Morality itself—the morality of this time period—may one day become the school of thought that it is only moral to overcome.