I agree that cynicism is warranted, but an alternative view is that rights and freedoms are gradually being offered to a wider and wider percentage of the population. We start off with rights reserved for all wealthy white landowners... along the way we get more rights for people of all races... both males and females... and so on as our reality comes into greater conformance with our ideals.
This is the "arc of the universe is long but it bends towards justice" narrative that Obama and MLK have favored; it resonates with me at least, even though I certainly believe there remains much work to be done.