Probability

As is evidenced by history things go on. Man continues, places are changed, and events happen.  What is the probability that it will continue as it has?  The interesting thing is that there was a point of beginning. Does that mean that there will be an eventual end?  Even if we over populate and disease and pestilence decimates the population some will survive. Even if we attempt to destroy ourselves with war eventually the survivors will call a truce. Even is we detonate nuclear winter there are places on earth where man will survive. Is there a time when man's existence is ended on this planet? I think not.