Say we accept one of the following principles as valid:
1. A creator designed the universe in a way conducive to the emergence of life and/or intelligence
2. There is an underlying principle in physics/cosmology that limits the universe's properties to only those conducive to life and/or mind.
3. The existence of the universe requires an observer, and therefore only universes with a capacity for consciousness can exist.
These three arguments have in common one thing; they all presume a unique place for life in the universe. Other than that unifying idea, the three theories are fairly dissimilar.
However, I believe that it is not necessary to know for certain which of the three is true. The fact that they all agree life is unique is enough information for me to go on building my philosophical foundation.
If life holds such a central, unique place in our universe, it follows that life likely has some purpose. Whether this purpose is to follow or seek knowledge about a creator, or to sustain the existence of the universe through observation, or something else entirely, at this point it only matters that our existence does indeed have some meaning.
Once we accept that life has a purpose, I think we must also accept that we don't know what that purpose is. Here many people will disagree with me, but I simply have not seen any substantive evidence in any one direction. There is enough information, however, to draw two other conclusions:
1. Since we don't know what life's purpose is, we cannot be sure if it has already been fulfilled. I therefore think that we must work, as the most advanced life we know of, to ensure life's survival until that point that we discover our purpose has been fulfilled. Alternativeley, if our purpose turns out to require our continued existence, I believe we must attempt to prolong life until the end of the universe.
2. Since we cannot know if life has fulfilled its purpose (and cannot work to fulfill it if it remains unfulfilled) unless we know what it is, I believe that it is logical to adopt an "interim purpose" of searching for the overarching meaning of our existence. Since that meaning almost certainly has to do with either ourselves, the universe or a hypothetical creator of the universe, I would go so far as to adopt a more specific "interim purpose":
*Humanity, as the most complex life known, should strive to find the meaning of life's existence through the exploration, observation, analysis and experience of as much of the universe, and the life that exists within it, as possible*
So, if we accept a model of the universe that suggests an overarching meaning of life, I believe we must also accept that our two greatest goals should be the survival and propagation of life, and the acquisition of knowledge about the nature of life and the universe.
