Career
Olesen has notably advanced the notion of transcendental history. In his book (2013) Olesen addresses the two-fold question of what makes history possible and how history conditions human existence and knowledge. The concept of history in this sense encompass something else and something more that what we are used to from everyday speech, and it also differs in this way from what one encounters as "history" in the scientific discipline of history.
In his book, Olesen gives an exposition of and a defense for the view, that historicality is the pivotal condition for human knowledge and existence.
Something is historical by virtue of its mode of appearance, which has human existence as a transcendental condition. But on the other hand, what makes history possible is human existence.
In this way history of philosophy and philosophy of history become inseparable. History first became a problem for philosophy, when philosophy became aware of itself as historically situated and contingent.
Even the concept of identity, whose timelessness and unchanging nature was assumed in premodern philosophy, becomes temporal and thereby also historical and thus has history as a transcendental condition.
The thesis central to is: lieutenant is not the subject or consciousness which is the transcendental condition of knowledge, but rather history. And history is furthermore the transcendental condition for the subject and consciousness. Transcendental history as a philosophical enterprise thus becomes both metaphilosophy, metaphysics, epistemology and philosophy of consciousness.
