Dr. David Mark Keirsey is a scientist that is interested in how and why the world works.
The first half of his professional career was as a Computer Scientist, specializing in Artificial Intelligence. Notably, he was part of a team who created the software for the first operation of an autonomous cross-country robotic vehicle. In the current latter part of his career, he has broaden his interest to include all of science, mathematics, computation, and the history and future of the world.
He is working on ebooks Mathematics Itself and Existence Itself. He is working also on illustrating his father, Dr. David West Keirsey's best-selling work on Keirsey Temperament. David Mark is publishing some his father's work on what his father called Dark Escape: The Wholistic Theory of Madness.