To the background of unprecedented depravity and evil in regard to sexual morality and unborn life, and of ambiguous and conciliatory reactions from the Church hierarchy, the author presents Catholic teaching on marriage and on the sins opposed to it (particularly abortion) from the standpoint both of ethics and of moral theology. In the course of this treatment he offers a detailed critique of certain novel doctrines promulgated by the Magisterium from the Second Vatican Council onwards. amongst which are the doctrines of 'Magisterial Personalism' and Theology of the Body. The book seeks to bring light to a world plunged in profound darkness which has been created by the Devil and which is no longer systematically dispelled even by the guardians of the Truth themselves.