Sao Paulo, Brazil - September 2016 - UNISAL, the Salesian University Centre of San Paolo in partnership with the Pontifical Catholic University held the Second International Congress on the Social Doctrine of the Church from 28 to 30 September. The objective was to reflect on "the Social Doctrine of the Church and merciful care of the weakest". The congress was coordinated by Professor Rosana Manzini of UNISAL and had about 500 participants. It was opened by Metropolitan Archbishop Gustavo Rodrigues Vega of Yuacatán (Mexico) and President of the CELAM Social Commission. Fr Thomas Brennan, of the Province of New Rochelle, who is the Salesian representative at the United Nations, addressed the topic of human trafficking. Fr Ronaldo Zacharias, Rector of UNISAL, spoke on the role of Catholic Universities in the promotion and protection of the weakest.