Complex sentence: The Society of Jesus (Jesuit Order) founded by the Spaniard Saint Ignatius Loyola in 1540 were leaders of the Counter-Reformation, who have contributed a great many distinguished scientists and institutions of learning, right up to the present.
Split into simpler sentences: The Society of Jesus (Jesuit Order) was founded by the Spaniard Saint Ignatius Loyola in 1540. Jesuits were leaders of the Counter-Reformation, who have contributed a great many distinguished scientists and institutions of learning, right up to the present.