EDIT
The squirmings of the leftward end of American culture and politics are a little subtler, since the Left by and large responded to the end of the Seventies by clinging to its historic ideals, while quietly shelving any real attempt to do anything about them. It’s discomfort with this response that leads so many people on the Left to insist angrily that they’ve done all they can reasonably be expected to do about the environment, in the midst of pursuing a lifestyle that’s difficult to distinguish, on any basis but that of sheer fashion, from that of their Republican neighbors. It also drives the frankly delusional insistence on the part of so many people on today’s Left that everyone on Earth can aspire to a middle class American lifestyle if the evil elites already discussed would simply let it happen, and the equally, if more subtly, delusional claim that some suite of technologies currently in the vaporware stage will permit the American middle class to have its planet and eat it too.
Look beyond the realm of partisan quarrels and the same deeply troubled conscience appears over and over again in American life. Consider, as one example out of many, the way that protecting children turned from a reasonable human concern to an obsessive-compulsive fixation. Raised under the frantic surveillance of helicopter moms, forbidden from playing outside or even visiting another child’s home except on the basis of a prearranged and parentally approved play date, a generation of American children were held hostage by a galaxy of parental terrors that have only the most distorted relationship to reality, but serve to distract attention from the fact that the lifestyles chosen by these same parents were condemning their children to a troubled and dangerous life in a depleted, polluted, and impoverished world.
The irony reached a dizzying intensity as tens of thousands of American parents rushed out to buy SUVs to transport their children to places every previous generation of American children proved perfectly capable of reaching by themselves on foot or on bike. It became the conventional wisdom, during the peak of the SUV craze, that the safety provided to young passengers by these massive rolling fortresses justified their purchase. No one wanted to deal with the fact that it was precisely the lifestyle exemplified by the SUV that was, and remains, the single most pressing threat to children’s long-term safety and welfare.
A great many of the flailings and posturings that have defined American culture from the Eighties to the present, in other words, unfolded from what Jean-Paul Sartre called “bad faith” – the unspoken awareness, however frantically denied or repressed, that the things that actually mattered were not things anyone was willing to talk about, and that the solutions everyone wanted to discuss were not actually aimed at their putative targets. The lie at the heart of that bad faith was the desperate attempt to avoid facing the implications of the plain and utterly unwelcome fact that there is no way to make a middle class American lifestyle sustainable.
EDIT
http://www.energybulletin.net/stories/2011-04-27/alternatives-nihilism-part-three-remember-your-name