 Complete the following phrase:  His moral philosophy is defined in his college textbook Elementa Philosophica as the Art of pursuing our highest Happiness by the practice of virtue. It was promoted by President Thomas Clap of Yale, Benjamin Franklin and Provost William Smith at The Academy and College of Philadelphia, and taught at Kings College now Columbia University, which Johnson founded in 1754. It was influential in its day: it has been estimated that about half of American college students between 1743 and 1776, and over half of the men who contributed to the Declaration of Independence or debated it were connected to Johnsons American Practical Idealism moral philosophy. Three members of the Committee of Five who edited the Declaration of Independence were closely connected to Johnson: his educational partner, promoter, friend, and publisher Benjamin Franklin of Pennsylvania, his Kings College student Robert R. Livingston of New York, and his son William Samuel Johnsons legal protegee and Yale treasurer Roger Sherman of Connecticut. Johnsons son William Samuel Johnson was the Chairman of the 