Introduction -- Rational anthropology and the difference between persons and animals -- Human freedom and conscience -- The three moral determinants and doubts of conscience -- The principle of double effect and consequentialism -- Cooperation and scandal -- Virtues--natural and supernatural -- Sin and grace -- Revelation -- Reproductive technologies -- Homosexuality and same-sex marriage -- Contraception -- Abortion -- Marriage and family -- End of life issues -- Appendix A : Summary of Evangelium Vitae -- Appendix B : Summary (...) of Savifici Doloris. (shrink)