<span style="color: #222222;">Vice President M Venkaiah Naidu today greeted people on International Day of Families. In a tweet, Mr Naidu said, families are the essential building blocks of a healthy and value-based society.<br />'' <br />'' He said, our age-old Indian family system has preserved our social and cultural values over millennia.<br />'' <br />''On this day, Mr Naidu called upon people to resolve to strengthen the family system for the benefit of the future generations.</span>