Just as artist and inventor Leonardo da Vinci partaking of the zeitgeist though not himself a humanist advocated study of human anatomy, nature, and weather to enrich Renaissance works of art, so Spanish-born humanist Juan Luis Vives (c. 14931540) advocated observation, craft, and practical techniques to improve the formal teaching of Aristotelian philosophy at the universities, helping to free them from the grip of Medieval Scholasticism. Thus, the stage was set for the adoption of an approach to natural philosophy, based on empirical observations and experimentation of the physical universe, making possible the advent of the age of scientific inquiry that followed the Renaissance.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): What type of philosophy was essential to this forwarding of thought?
Aristotelian