To delve into the most obscure nooks and crannies of the problem, a complete solution lies in finding apostles like those described by Abbot Jean-Batiste Chautard in his famous work, The Soul of the Apostolate.
They must be endowed with real interior life, desirous above all to see the accomplishment of God’s will and designs on earth as it is in heaven.
They must be apostles who draw others with their example, move people with their word, and strive to make the laws of the state in accordance to those of God, thus changing people’s behavior.
In short, the action of these authentic apostles can really touch souls. If these correspond to grace, they will convert.
And to convert, contemporary man must be docile to the recommendation of Our Lady to mankind at Fatima in 1917: they must pray and do penance.