[markomalley]

Suggestion: become intimately familiar with the Compendium of the Social Doctrine of the Church (also available in hardcover from most Catholic bookstores)

Make sure when you discuss social justice issues, use the language of the Church. Quoting popes is sometimes effective (not always, but it can influence fence-sitters).

[SumProVita]

The Compendium of Social Doctrine is excellent. It places these teachings of the Church in the correct context.....a context which is sadly not well understood by many Catholics these days.