retrospection
From Longman Dictionary of Contemporary Englishretrospectionret‧ro‧spec‧tion /ˌretrəˈspekʃən/ noun [uncountable] formalPAST thinking about the pastExamples from the Corpusretrospection• Preparing to write his great work of self-analysis and retrospection, Proust in effect retired from life.• But an important aspect of problem solving is retrospection.• I was too bound up with the problems of the present moment to enjoy the luxury of retrospection.