A question that has made philosophers stretch their minds endeavoring to find an approximation and not an answer. Today comes some knowledge that shades light on our neural connections and we again just reach approximations of why we are actually living. Evolutionary psychology is also contributing on this matter.
I believe that discussions are the ripe fruits that our minds love to ingest, but where do ideas come from and where do they lead is not well known especially in conserved places.
Let's reduce it into the three needs of most mammalian species which is food, shelter, and sex, but that would be a reduction which many people won't love so much. So let's acknowledge the presence of the neocortex and realize that we are the beings that have that time between and instinct and a response, so we are conscious beings. We can analyze our actions and decide to take a step forward or to flinch back.
I find beauty in deep anthropological conversations and I believe that anyone can live where his mind is respected and his needs are met without too much stress. We love to express and we love to be heard and we love to feel that we are meaningful species. We have emotions and we like to see them growing. It is beautiful to be empathetic and find real purpose behind being like that.