Why are human beings born? This question has posed a great challenge for civilisations and societies all around the world for thousands of years.
The second president of the Soka Gakkai, Josei Toda, had this to say about his own conclusions.
“This world is a place for people to, as the Lotus Sutra states, ‘Enjoy themselves at ease’.
We were born here to thoroughly savour the joys of life.
Faith in Nichiren Buddhism enables one to bring forth the great life-force needed to lead such an existence.”
The arrival of a new-born baby makes us think about such questions and such an answer goes a long way to solving the riddle.
The Search For Enlightenment 
Jul 22, 2011 @ 04:25:56
From what I understand of Buddhism, we are born because of the karma we’ve created in the past lives. If it’s good karma, then we’re reborn in this life to enjoy an “easy” life, and if it’s bad karma, we’re reborn in this life to “pay back what we owe”. Once the scale of karma is balanced, then we can escape from the circle of life.