the article puts in relation calderón with the modern philosophy. the methodical doubt of descartes is compared with the dramatized disillusion of calderón. both ruin the supposed primary reality of the world, but calderón comes, as kant, to the affirmation of the freedom as original reality. but this affirmation has problems with the destiny or the fortune, the power of the father or of the king, the law of the honor or social pressure, and the divine omnipotence. three strategies or ends show themselves then in the dramas of calderón: the tragic failure, the worldly prudence and the religious dedication.