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In 1934, Paul Weiss, an American philosopher, the founder of The Review of Metaphysics, and the Metaphysical Society of America, called Charles Peirce "the most original and versatile of American philosophers and America's greatest logician".

In 1943, Webster's Biographical Dictionary added Charles Peirce’s introduction as "now regarded as the most original thinker and greatest logician of his time."

Max Fisch, a well-known writer of identity, individuality, responsibility, morality, and political commitment, commented Charles Peirce as the follow:

“Who is the most original and the most versatile intellect that the Americas have so far produced? The answer Charles S. Peirce is uncontested, because any second would be so far behind as not to be worth nominating. He was mathematician, astronomer, chemist, geodesist, surveyor, cartographer, metrologist, spectroscopist, engineer, inventor; psychologist, philologist, lexicographer, historian of science, mathematical economist, lifelong student of medicine; book reviewer, dramatist, actor, short story writer; phenomenologist, semiotician, logician, rhetorician and metaphysician.”

Without any doubt, Charles Peirce is in the row of the best minds with Henry George, William James, Thorstein Veblen, and Ludwig Wittgenstein.

In 1879, Charles Peirce published a remarkable paper about a conformal map projection A QUINCUNCIAL PROJECTION OF THE SPHERE. In this paper, Peirce presented his projection of the sphere as that the Northern Hemisphere is in a square and the Southern Hemisphere is split into four isosceles triangles symmetrically surrounding the first one. His view of the sphere is a star-like projection. In Charles Peirce’s presentation, the whole map is a square after the arrangement of five items in a quincunx.

This is a must-read book to understand the foundational thought of the sphere by Charles Peirce, one of the greatest philosophers and logicians in the world.