The difference is that in the 70s, it was "civilization as we know it survives if only a few people at key points of power manage to keep themselves together" (

The difference is that in the 70s, it was "civilization as we know it survives if only a few people at key points of power manage to keep themselves together" (i.e. not pull the trigger to MAD), while today "civilization as we know it survives if the society at large manages to refactor its consumption habits." The latter seems harder to get buy-in for.