5 We have no need to tell you, Venerable Brethren, what prosperity and well-being, what peace and harmony, what respectful subjection to authority and what excellent government would be obtained and maintained in the world if one could see in practice the perfect ideal of Christian civilization. Granting, however, the continual battle of the flesh against the spirit, darkness against light, Satan against God, such cannot be hoped for, at least in all its fullness. Hence, raids are continually being made on the peaceful conquests of the Church. The sadness and pain these cause is accentuated by the fact that society tends more and more to be governed by principles opposed to that very Christian ideal, and is even in danger of completely falling away from God.
Source: Il Fermo Proposito (Vatican.va)