I, personally, think there is insufficient focus on doing what is doable in the here and now. Society is reshaped all the time, every day, by every choice ever person makes. If we aren't even trying to push it in X direction because we are spending our energy justifying not bothering to try that -- "because it's too tough" -- then that strikes me as self-fulfilling prophecy.

I get really tired of self-fulfilling prophecy. Given what is at stake, I think we can and should do better than simply justifying our failures to adequately rise to the occasion.