Comment by cryptonector

If culture is a random walk around a center of mass but without a strong negative feedback mechanism to keep that center of mass where we (we who?) want it, then it could easily go in any direction and keep going. However when you add our ability to collectively enjoy hedonistic culture more than intellectual culture, then it makes sense that there is just one direction that this random walk is going to take. Moreover, over time that preference of "culture" to move in one direction will be amplified by each generation, thus the trend should accelerate.