Returning to our principle that grace presupposes nature, we can say that the Church has concern for the worldly, not because she wishes to dictate the details of its technical operations, but because man needs a healthy material foundation if his spiritual life is to thrive to its utmost. The Church concerns itself with temporal affairs only insofar as they threaten spiritual affairs, which means that her concern will necessarily expand in times of turmoil and economic confusion. Particularly when the conditions of man’s earthly existence drop below a certain minimum, the Church cannot and will not remain silent. It was precisely this situation which gave birth to, and fuels, the further development of CST:
…it is not rash by any means to say that the whole scheme of social and economic life is now such as to put in the way of vast numbers of mankind most serious obstacles which prevent them from caring for the one thing necessary; namely, their eternal salvation.
Woe to the man who claims that economic and political conditions have no bearing on the spiritual life. Clearly it is due precisely to the Church’s eternal concerns that she refuses to remain indifferent to temporal ones.
 QA, 130.
 CSDC, 71; EN, 34.