I guess that I could argue that you don't seem to have a good grasp of the tenets of Calvinism, but I will choose to answer you with a simple question: Who will believe? (See Romans 3 for the state of man, and recognize that it is only by the divine intervention of God that any of us are saved.)
I'm not sure I worded that question correctly... If the elect are already known.... so be it... but whats the point of having a sect based on that belief... its seems fruitless as you can't change anything by that understanding. It just strikes me as a philosophy that could be used to create a horror... a horror of elitism. "We're better because G-d has already for-ordained our salvation... we are your superiors." Do Calvinist believe that only Calvinist can be of the "elect"?
I have to admit that Calvinism has always fascinated me.