Johnson's moral philosophy did not long outlast the Revolution in college classrooms, as "Scottish realism became the academic prop of American higher education" all the way through "the middle of the eighteenth century". However, Johnson's moral philosophy, defined in his textbook "Elementa Philosophica "as "the Art of pursuing our highest Happiness by the universal practice of virtue", influenced the core documents of the American Republic, and hence his work is still active in the governing and culture of America as embodied in the phrase, "life, liberty, and the pursuit of Happiness". Dr. Samuel Johnson, along with Dr. Benjamin Franklin and Dr. William Smith, may be considered one of the “Founding Grandfathers” who "first created the idealistic moral philosophy of 'the pursuit of Happiness', and then taught it in American colleges to the generation of men who would become the Founding Fathers." Today, there is once again a great deal of intellectual activity on the philosophy of happiness.