In his 1951 encyclical on the promotion of Catholic missions, Evangelii Praecones, Pope Pius XII wrote of the great spiritual battle that was raging over seventy years ago: “Venerable Brethren, you are well aware that almost the whole human race is today allowing itself to be driven into two opposing camps, for Christ or against Christ. The human race is involved today in a supreme crisis, which will issue in its salvation by Christ, or in its dire destruction. The preachers of the Gospel are using their talents and energy to extend the Kingdom of Christ; but there are other…