Other than the instinctual drives to procreate and survive, we are each saddled with the awesome task of creating meaning.
We had discussed on another thread "Why do we have a 'need' for the human race to continue after we are gone?" After all, every single life on the planet will end in one lifetime regardless of annihilation. Is it because of love for our children? Is it an extension of our survival instinct? Why do so many of us (atheists) make, "improving humanity" a component of our life meaning?