What is the purpose of human life?

What is life all about? What is the objective?

I am trying to find what all human beings have in common, without regard to our culture, age, sex, historical age, religion, social class, education or personal beliefs like gods; using intelligence and reason, based on evidence?

By finding similarities in what we seek in life we can build a more harmonious world society.

Thanks for your answers, thanks for your time.