Being and Time mentioned in "Being and Time", has been identified by some with Heidegger's central notion of "Sorge" ("cura", care or concern). However, for Heidegger, "theoretical" knowledge represents only one kind of intentional behaviour, and he asserts that it is grounded in more fundamental modes of behaviour and forms of practical engagement with the surrounding world. Whereas a theoretical understanding of things grasps them according to "presence," for example, this may conceal that our first experience of a being may be in terms of its being "ready-to-hand." Thus, for instance, when someone reaches for a tool such as a hammer, their understanding
David Gordon (philosopher) and was strongly influenced by German philosopher Friedrich Adolf Trendelenburg. Gordon later wrote an essay, "Second Thoughts on The Philosophical Origins of Austrian Economics," to provide some additions and corrections to his book. Gordon edited the collection, "Secession, State & Liberty" (2002), eleven essays that suggest that secession should be given serious consideration. The essays examine United States history, look at theoretical issues, and apply theory to the modern world. In 2011 Gordon conducted a study with Swedish consultant Per Nilsson on books published by Harvard University Press. They published the results of their analysis as "The Ideological Profile of