Life, liberty and the pursuit of happiness means different things to different people.  For some, the choice not to have children is one way of living a fulfilling life.  We learn more about the childfree movement in this conversation with Dr Amy Blackstone, author of Childfree by Choice: The Movement Redefining Family & Creating a New Age of Independence.  Dr Blackstone is a professor in Sociology and the Margaret Chase Smith Policy Center at the University of Maine where she studies childlessness and the childfree choice.