1225?-1274 1809-1865 19thcentury 352b abraham autobiography bio011000his036050his036040phi019000 biography civilwarperiod(1850-1877) decisionmaking democracy ethicslincoln headsofstate his036050bio011000per004000his049000 history influencearistotle influencethomas knowledgeandlearninglincoln learningandscholarship lincoln philosophy political politicalandsocialviews politicalandsocialviewslincoln politicalleadership politicalscience politicsandgovernment presidents religionlincoln unitedstates