All law is based upon morality, and morality is itself based upon religion. Therefore, when the religion of a people is weakened, so also is its morality undermined. The result is a progressive collapse of law and order, and the breakdown of society.
Men, though, see law as a limitation on their liberty, and Christianity is held to be the most restrictive with its emphasis upon Biblical law as the foundation for morality and liberty. Humanistic man wants total liberty, but he does not realize that total liberty leads only to total anarchy, and that leads to the death of law and liberty. Unless every man's liberty is limited by law, no liberty is possible for any one.
In this concise volume, R. J. Rushdoony expounds on the central themes of the application of Biblical law to every area of life. This book is a great starting point to understanding Rushdoony's larger expositions on Biblical law.