I think a caviat to that Brutha would be that defining a new reality for society is a means of taking power (a revolution).
I think it's important to recognize as well that there are different scales of reality. There is a global reality and a global culture that is defined by those in power definitely but when you get down to smaller scales, say a city for example, it is much easier to excercise control over the construction of reality. (by running for city council for instance, or challenging the status quo through
culture jamming)
And if you take it down to the scale of the individual you are ultimately the one with all the power to construct whatever reality you like for yourself.