This argument was written out in "Humanae Vitae", a papal encyclical released in 1968. With Presying, he helped draft the 1937 papal encyclical. Like Konrad von Preysing, he assisted with the drafting of the 1937 papal encyclical. Like Presying, he assisted with the drafting of the 1937 papal encyclical. Galen was part of the five-member commission that prepared the papal encyclical. Laudato si () is the second encyclical of Pope Francis. In Latin America, much support developed for the Pope and his encyclical. As the encyclical tells, first are the Catholic bishops. This is the first encyclical to cite bishops' conferences. The draft encyclical was delivered to the Vatican in September 1938. The draft encyclical clearly condemned colonialism, racism and antisemitism. Philosophy and theology are the main topics of this encyclical. In 2017, anticipating the 50th anniversary of the encyclical, four theologians led by Mgr. In drafting the encyclical, the Vatican consulted with leading scientific experts for months. Catholic Millennials have written widely giving their opinions of the encyclical.