So what is the purpose of life? It is only to reproduce and grow more humans until we overpopulate this limited sphere and start suffering and dieing off due to shortages of energy, food, omega 3 oil, or other resource? Or will we turn more violent and kill each other off to get "our share" of needed resources?
I have talked about this before at http://oathursdaynightgroup.blogspot.ca/2013/04/the-purpose-of-life.html and http://oathursdaynightgroup.blogspot.ca/2012/07/what-is-our-purpose.html.
All this assumes there is purpose, and that we humans can produce a concept of purpose. But there is a greater question, does nature have a purpose for humanity? Or is it all meaningless development, growth, without a purpose. Any concept of god would suggest that there is purpose, but we know that god is a humanization of nature, not a real supernatural or natural being, in short a human construct, likely to explain that which we could not. This is not unlike "She who must be obeyed" philosophy. But if there is not a "god", who or what would creates a purpose? It is all just a rolling cylinder, with direction but without it's own source of energy, no plan, no purpose? Who can know where it will end up.
Human development in then meaningless, but we humans can make the best of it anyway. We can be motivated into what ever we fancy is our ultimate end game. To create, to reproduce, to develop, and to support those activities. Or we call all just fight, kill each other. We could, if we chose, to evolve into a society where we all work together for the common good, where force will not be used to compel adherence to a political or philosophical belief system. The StarTreck prime directive could be held as one of our esteemed laws, and reason rules the behavior of people. Yah Sure, not likely.
We are all driven by our desires. Can we learn to direct these desires? The desires exist strongly in many of us; for too much food; gluttony, greed, and similar terms can be applied. But is it too much desire, lack of proper directions for desire, or are we just using an available resource to satisfy an unresolved desire. Is that why there is so much overlap in excesses, alcohol, food, sex, drug, gambling, just an unfulfilled desire that would be better directed elsewhere?