 Inductivism's basis is, in sum, "the idea that theories can be derived from, or established on the basis of, facts".Evolving in phases, inductivism's conceptual reign spanned four centuries since Francis Bacon's 1620 proposal of it against Western Europe's prevailing model, scholasticism, which reasoned deductively from preconceived beliefs.From the 19th and 20th centuries, inductivism succumbed to hypotheticodeductivism—sometimes worded "deductivism"—as scientific method's realistic idealization.