All the social sciences find their starting points in the lifeworld.
All social science theories originally found their impetus in the world of everyday lived experience. All social science is built on a substrate of phenomenological meanings. For this reason the social sciences themselves are a source for phenomenological meaning and insight. The phenomenologist who wants to study the phenomenology of grief, solitude, learning, reading, illness, anxiety, pain, and so forth, should examine the existent theories for whatever phenomenological insights they may yield.