Can writing enact social change

I believe this question can go two ways. Yes writing has the power to enact social change, but it highly depends on the reader. If the reader is stubborn as a mule then he will not be changed, but if the reader is open to new ideas then they can most definitley be changed.
Also, the piece of writing has to truly be meaningful because if you write any old piece of crap then the reader is not going to soak any of it in. For instance, some people who sparked social change by writing are Martin Luther King, John F. Kennedy, and of course Jesus and the disciples. JFK and MLK's speeches both sparked huge social change and the bible is one of the most, if not the most, influential books in the world.