The invention of the printing press encouraged secularism as people could more easily share ideas that challenged church teachings.
After the invention of the printing press, the text would survive. Thus, an intellectual movement took place in Europe. People started translating texts by Roman authors or texts from the ancient Greek as well. These books dealt with Science, Math, Philosophy including ideas opposing the church belief.
It is important to highlight that secularism refers to the doctrine of separation between government institutions and religious institutions.