Leo Strauss ( ; ] ; September 20, 1899 – October 18, 1973) was a German-American political philosopher and classicist who specialized in classical political philosophy.
 He was born in Germany to Jewish parents and later emigrated from Germany to the United States.
 He spent most of his career as a professor of political science at the University of Chicago, where he taught several generations of students and published fifteen books.
Choiceless awareness is posited in philosophy, psychology, and spirituality to be the state of unpremeditated, complete awareness of the present without preference, effort, or compulsion.
 The term was popularized in mid-20th century by Jiddu Krishnamurti, in whose philosophy it signifies a main theme.
 Similar or related concepts had been previously developed in several religious or spiritual traditions; the term or others like it has also been used to describe traditional and contemporary secular and religious meditation practices.
 By choiceless awareness as a concept or term had appeared in a variety of fields, including in neuroscience, therapy, sociology, and in art.
 However, Krishnamurti's approach of the subject was unique, and differs from both prior and later notions.
J. Baird Callicott is an American philosopher whose work has been at the forefront of the new field of environmental philosophy and ethics.
 He is a University Distinguished Research Professor and a member of the Department of Philosophy and Religion Studies and the Institute of Applied Sciences at the University of North Texas.
 Callicott held the position of Professor of Philosophy and Natural Resources at the University of Wisconsin–Stevens Point from 1969 to 1995, where he taught the world’s first course in environmental ethics in 1971.
 From 1994 to 2000, he served as Vice President then President of the International Society for Environmental Ethics.
 Other distinguished positions include visiting professor of philosophy at Yale University; the University of California, Santa Barbara; the University of Hawai’i; and the University of Florida.
Seyyed Ahmad Fardid (Persian: سید احمد فردید‎ ‎ ) (Born in 1912, Yazd – 16 August 1994, Tehran), born Ahmad Mahini Yazdi, was a prominent Iranian philosopher and an inspiring and dedicated professor of Tehran University.
 He is considered to be among the philosophical ideologues of the Islamic government of Iran which came to power in 1979.
 Fardid was under the influence of Martin Heidegger, the influential German philosopher, whom he considered "the only Western philosopher who understood the world and the only philosopher whose insights were congruent with the principles of the Islamic Republic.
 These two figures, Khomeini and Heidegger, helped Fardid argue his position."
 What he decried was the anthropocentrism and rationalism brought by classical Greece, replacing the authority of God and faith with human reason, and in that regard he also criticized Islamic philosophers like al Farabi and Mulla Sadra for having absorbed Greek philosophy.
Graham Robert Oppy (born 6 October 1960) is an Australian philosopher whose main area of research is the philosophy of religion.
 He currently holds the posts of Professor of Philosophy and Associate Dean of Research at Monash University and serves as Associate Editor of the Australasian Journal of Philosophy, and serves on the editorial boards of Philo, Philosopher's Compass, Religious Studies, and Sophia.
Harry Victor Jaffa (October 7, 1918 – January 10, 2015) was an American political philosopher, historian, columnist and professor.
 He was the Professor Emeritus at Claremont McKenna College and Claremont Graduate University and a distinguished fellow of the Claremont Institute.
 Robert P. Kraynak says his "life work was to develop an American application of Leo Strauss's revival of natural-right philosophy against the relativism and nihilism of our times."
Quintus Sextius the Elder ( ; Latin: "Quinti Sextii Patris" ; fl.
 c. 50 BC) was a Roman philosopher, whose philosophy combined Pythagoreanism with Stoicism.
 His praises were frequently celebrated by Seneca.
Danielle Monique Macbeth (born 1954 in Edmonton, Canada) is a philosopher whose work focuses on the philosophy of mathematics, the philosophy of language, metaphysics, and the philosophy of logic.
 She is T. Wistar Brown Professor of Philosophy at Haverford College in Pennsylvania where she has taught since 1989.
 Macbeth also taught at the University of Hawaii from 1986-1989.
Sir Anthony John Patrick Kenny {'1': ", '2': ", '3': ", '4': "} (born 16 March 1931) is an English philosopher whose interests lie in the philosophy of mind, ancient and scholastic philosophy, the philosophy of Wittgenstein and the philosophy of religion.
 With Peter Geach, he has made a significant contribution to Analytical Thomism, a movement whose aim is to present the thought of St. Thomas Aquinas in the style of modern philosophy of traditional Thomism.
 He is one of the executors of Wittgenstein's literary estate.
 He is a former President of the British Academy and the Royal Institute of Philosophy.
Thomas Seebohm (born William Thomas Mulvany Seebohm, July 7, 1934, Gleiwitz, Upper Silesia – August 25, 2014, Bonn, Germany) was a phenomenological philosopher whose wide-ranging interests included, among others, Immanuel Kant, Edmund Husserl, hermeneutics, and logic.
 Other areas of Professor Seebohm's interests included the history of philosophy, philosophy of history, philosophy of the formal sciences, methodology and philosophy of the human sciences, the history of 19th century British Empiricism, American pragmatism, analytic philosophy, philosophy of law and practical philosophy, and the development of the history of philosophy in Eastern Europe.
 Despite this diverse span of interests, Seebohm was chiefly known as a phenomenologist, who "above all...considered himself a creative phenomenologist, who as a critically reflecting philosopher would look at all major issues with which he became confronted, from a transcendental phenomenological point of view."

Question: What was the nationality of the philosopher whose philosophy Harry Victor Jaffa developed an American application of?
Answer: German-American