The Lovejoy approach
The historian Arthur O. Lovejoy (1873–1962) coined the phrase history of ideas and initiated its systematic study in the early decades of the 20th century. Johns Hopkins University was a "fertile cradle" to Lovejoy's history of ideas; he worked there as a professor of history, from 1910 to 1939, and for decades he presided over the regular meetings of the History of Ideas Club. Another outgrowth of his work is the Journal of the History of Ideas.
Aside from his students and colleagues engaged in related projects (such as René Wellek and Leo Spitzer, with whom Lovejoy engaged in extended debates), scholars such as Isaiah Berlin, Michel Foucault, Christopher Hill, J. G. A. Pocock, and others have continued to work in a spirit close to that with which Lovejoy pursued the history of ideas. The first chapter of Lovejoy's book The Great Chain of Being (1936) lays out a general overview of what he intended to be the programme and scope of the study of the history of ideas.