A History of String Theory

Policy advocacy and activism
Kaku, protesting at Cape Canaveral demonstration, 1987

Kaku has publicly stated his concerns over matters including people denying the anthropogenic cause of global warming, nuclear armament, nuclear power, and what he believes to be the general misuse of science.[25] He was critical of the Cassini–Huygens space probe because of the 72 pounds (33 kg) of plutonium contained in the craft for use by its radioisotope thermoelectric generator. Conscious of the possibility of casualties if the probe's fuel were dispersed into the environment during a malfunction and crash as the probe was making a "sling-shot" maneuver around Earth, Kaku publicly criticized NASA's risk assessment.[26] He has spoken on the dangers of space junk and called for more and better monitoring. Kaku is generally a vigorous supporter of the exploration of space, believing that the ultimate destiny of the human race may lie in extrasolar planets, but he is critical of some of the cost-ineffective missions and methods of NASA.[citation needed]

Kaku credits his anti-nuclear war position to information he learned via programs he heard on the Pacifica Radio network during his student years in California. It was during this period that he made the decision to turn away from a career developing the next generation of nuclear weapons in association with his mentor, Edward Teller, and instead focused on research, teaching, writing, and accepting media opportunities to educate. Kaku joined with others such as Helen Caldicott, Jonathan Schell, and those associated with Peace Action, which was instrumental in building a global anti-nuclear weapons movement that arose in the 1980s during the administration of U.S. President Ronald Reagan.

Kaku was a board member of Peace Action and of radio station WBAI-FM in New York City, where he originated his long-running program, Exploration, that focuses on the issues of science, war, peace, and the environment.

His remark from an interview in support of SETI, "We could be in the middle of an intergalactic conversation... and we wouldn't even know", is used in the third Symphony of Science installment "Our Place in the Cosmos". Kaku is also a member of the CuriosityStream advisory board.[27]

Works

Kaku, Michio; Trainer, Jennifer, eds. (1982). Nuclear Power: Both Sides. New York: Norton. ISBN 0-393-01631-5.
Kaku, Michio; Jennifer Trainer Thompson (1987). Beyond Einstein: Superstrings and the Quest for the Final Theory. Oxford: Oxford University Press. ISBN 0-19-286196-4.
Kaku, Michio; Daniel Axelrod (1987). To Win a Nuclear War: The Pentagon's Secret War Plans. Boston: South End Press. ISBN 0-89608-321-7.
Kaku, Michio (1993). Quantum Field Theory: A Modern Introduction. New York: Oxford University Press. ISBN 0-19-507652-4.
Kaku, Michio (1994). Hyperspace: A Scientific Odyssey Through Parallel Universes, Time Warps, and the Tenth Dimension. Oxford: Oxford University Press. ISBN 0-19-286189-1.
Kaku, Michio (1998). Visions: How Science Will Revolutionize the 21st Century. New York: Oxford University Press. ISBN 0-19-288018-7.[31]
Kaku, Michio (1999). Introduction to Superstrings and M-Theory. New York: Springer. ISBN 0-387-98589-1.
Kaku, Michio (1999). Strings, Conformal Fields, and M-Theory. New York: Springer. ISBN 0-387-98892-0.
Kaku, Michio (2004). Einstein's Cosmos: How Albert Einstein's Vision Transformed Our Understanding of Space and Time. London: Weidenfeld & Nicolson. ISBN 0-297-84755-4.
Kaku, Michio (2004). Parallel Worlds: The Science of Alternative Universes and Our Future in the Cosmos. London: Allen Lane. ISBN 0-7139-9728-1.
Kaku, Michio (2008). "M-Theory: The Mother of All Superstrings" in Riffing on Strings: Creative Writing Inspired by String Theory. New York: Scriblerus. ISBN 978-0-9802114-0-5.
Kaku, Michio (2008). Physics of the Impossible. New York: Doubleday. ISBN 978-0-385-52069-0.
Kaku, Michio (2011). Physics of the Future: How Science will Shape Human Destiny and our Daily Lives by the Year 2100. New York: Doubleday. LCCN 2010026569.
Kaku, Michio (2014). The Future of the Mind: The Scientific Quest to Understand, Enhance, and Empower the Mind. New York: Doubleday. ISBN 978-0385530828.
Kaku, Michio (2018). The Future of Humanity: Terraforming Mars, Interstellar Travel, Immortality, and Our Destiny Beyond Earth. New York: Doubleday. ISBN 978-0385542760.
Kaku, Michio (2021). The God Equation: The Quest for a Theory of Everything. New York: Doubleday. ISBN 978-0385542746.

the phenomenon whereby a person is reluctant to abandon a strategy or course of action because they have invested heavily in it, even when it is clear that abandonment would be more beneficial.
"the sunk-cost fallacy creeps into a lot of major financial decisions"- dictionary