good question, and very good answers. May I add some thoughts.
We are all very unique individuals and my choose very different pathways. and fulfill different destinies. One common purpose we share is to learn to develop and share character traits, talents gifts and love with each other along the path. Another common purpose of life is to learn , and apply natural truths and laws, for the common good. I like the concept of progression to a higher, or better individual, and thus a better society. We can affect for good or bad.