Along with racial equality and the late bloom of women's rights, future generations will have to explain how, in the past, gays were misunderstood and publicly humiliated for loving each other, and, eventually, how they stood together and conquered stupidity and hypocritical hatred, and fought their way out of marginalization.
If future generations are to remember us more with gratitude than sorrow, we must achieve more than just the miracles of technology. We must also leave them a glimpse of the world as it was created, not just as it looked when we got through with it.
The most important thing about global warming is this. Whether humans are responsible for the bulk of climate change is going to be left to the scientists, but it's all of our responsibility to leave this planet in better shape for the future generations than we found it.
We have a moral responsibility to save wild places like the arctic refuge for future generations, and that is why our country has remained committed to its protection for nearly 50 years.
Looking ahead, future generations may learn their social skills from robots in the first place. The cute yellow Keepon robot from Carnegie Mellon University has shown the ability to facilitate social interactions with autistic children. Morphy at the University of Washington happily teaches gestures to children by demonstration.