Francis Jozwik received a Ph.D. in Plant Science and began his career lecturing in plant physiology with the University of Wisconsin System. He was later appointed Arid Lands Research Scientist with The Commonwealth Scientific and Industrial Research Organization of Australia. In addition to his scientific and academic background, Dr. Jozwik has worked and published several books in the field of commercial horticulture. Who's Who in America and Who's Who in the World have repeatedly honored Dr. Jozwik for his professional accomplishments. The National Science Foundation has supported some of his basic research in the field of biosystematics. Angst and Evolution represents a further extension of Dr. Jozwik's lifelong interest in evolutionary biology.