 Olaso taught in many universities both in Argentina and elsewhere. His Ph.D. dissertation has not been published, but many papers resulted from it. Olaso wrote a number of important papers on skepticism, both ancient and modern. He explored many authors in the 17th and 18th centuries: Hume, Benito Jerónimo Feijóo, Rousseau, Hobbes, and Leibniz. These developments were summarized in Olaso 1994. Many of his papers are dedicated to Hume’s skepticism. Olaso argued that Hume was an Academic skeptic, not a Pyrrhonist, as Popkin had supposed. More importantly, his study of certain Enlightenment authors made Popkin revise his interpretation that, apart from Hume, there was no interest at all in skepticism during the 18th century.