Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...

Source: Wikimedia commons, public domain. Whereas Leibniz, Kant, and Hegel could count as optimists (people who think that human life will improve), Schopenhauer is the first (and last) thinker in all ...