There are two basic factors that will shape mankind's future, one of them being definite and the other deciding. Our evolution and species development will ultimately give our human race some parts of the future to be uncontrolled. How our mankind uses this advancement throughout time, will give our species a certain amount of controllable future, as well. We must come to terms that the way Man has shaped our present from the past, will now shape it for the future.
Definite
Our evolution and development gives us our definite future. We all change and progress throughout generations, little by little. There is no stopping the evolution process of any kind simply due to the fact that it's the instinct that provides this. Our future generations inevitably will become more advanced and progressed than we are now, thus changing our future dramatically whether we like it or not. For example, if any naturally occurring event took place on Earth 30,000 years from now, we would undoubtedly be more susceptible to handle that situation rather than today. We understand this because our minds would be much greater in power thousands of years from now. This "mind-progression" will result from the natural yet definite future process of evolution.