In 1981 John Paul II, then pope of the Roman Catholic Church, spoke of the relationship this way: "The Bible itself speaks to us of the origin of the universe and its make-up, not in order to provide us with a scientific treatise, but in order to state the correct relationships of man with God and with the universe. Sacred Scripture wishes simply to declare that the world was created by God, and in order to teach this truth it expresses itself in the terms of the cosmology in use at the time of the writer". The influence of the Church on Western letters and learning has been formidable. The ancient texts of the Bible have deeply influenced Western art, literature and culture. For centuries following the collapse of the Western Roman Empire, small monastic communities were practically the only outposts of literacy in Western Europe. In time, the Cathedral schools developed into Europe's earliest universities and the church has established thousands of primary, secondary and tertiary institutions throughout the world in the centuries since. The Church and clergymen have also sought at different times to censor texts and scholars. Thus different schools of opinion exist as to the role and influence of the Church in relation to western letters and learning. One view, first propounded by Enlightenment philosophers, asserts that the Church's doctrines are entirely superstitious and have hindered the progress of civilization. Communist states have made similar arguments in their education in order to inculcate a negative view of Catholicism (and religion in general) in their citizens. The most famous incidents cited by such critics are the Church's condemnations of the teachings of Copernicus, Galileo Galilei and Johannes Kepler. The Church's priest-scientists, many of whom were Jesuits, have been among the leading lights in astronomy, genetics, geomagnetism, meteorology, seismology, and solar physics, becoming some of the "fathers" of these sciences. Examples include important churchmen such as the Augustinian abbot Gregor Mendel (pioneer in the study of genetics), Roger Bacon (a Franciscan friar who was one of the early advocates of the scientific method), and Belgian priest Georges Lemaître (the first to propose the Big Bang theory). Other notable priest scientists have included Albertus Magnus, Robert Grosseteste, Nicholas Steno, Francesco Grimaldi, Giambattista Riccioli, Roger Boscovich, and Athanasius Kircher. Even more numerous are Catholic laity involved in science:Henri Becquerel who discovered radioactivity; Galvani, Volta, Ampere, Marconi, pioneers in electricity and telecommunications; Lavoisier, "father of modern chemistry"; Vesalius, founder of modern human anatomy; and Cauchy, one of the mathematicians who laid the rigorous foundations of calculus.