Derbyshire book of popular mathematics: Unknown Quantity: A Real And Imaginary History of Algebra. Role in Way of the Dragon Derbyshire had an uncredited role in Way of the Dragon (released in the United States as Return of the Dragon), a 1972 martial arts film directed by, and starring, Bruce Lee. Of landing the part, Derbyshire said: "The casting director had obviously just trawled around the low-class guesthouses for unemployed foreigners of a sufficiently thuggish appearance." Views Derbyshire writes in general from a small government conservative perspective. He notably ridiculed George W. Bush's "itty-bitty tax cut, paid for by dumping a slew of federal debt on your children and grandchildren," derided Bush as too sure of his religious convictions and for his "rich-kid-ness". He has noted that small-government conservatism is unlikely to ever take hold in the United States (although he is personally sympathetic to it), called for immediate U.S. withdrawal from Iraq (but favoured the invasion), opposed market reforms or any other changes in Social Security, supported legal access to abortion, supported euthanasia in a fairly wide range of circumstances, and suggested that he might (in a time of international crisis) vote for Hillary Clinton as president. Derbyshire wrote about American schooling in his book We Are Doomed, "Education is a vast sea of lies, waste, corruption, crackpot theorizing, and careerist log-rolling." He further argued that people "had better brace ourselves for the catastrophe" coming as a result. Derbyshire once argued that America would be better off if women did not have the right to vote. In 2005, in a monthly column containing a series of miscellaneous musings, he controversially stated that women's physical attractiveness peaks between ages 15 and 20. Vs National Review Derbyshire differed from other writers at National Review magazine on many subjects. For example, Derbyshire supported Michael Schiavo's position in the Terri Schiavo case. Derbyshire's views on the Schiavo case attracted criticism from colleagues such as Ramesh Ponnuru. The Derbyshire–Ponnuru dispute arose again over Ponnuru's 2006 book The Party of Death. Derbyshire reviewed the book harshly in the New English Review, and Ponnuru replied on National Review Online. Though Derbyshire broadly agreed with other writers at National Review Online on immigration, he encountered strong opposition from former NRO blogger John Podhoretz, who described Derbyshire's comments on restricting immigration to maintain "ethnic balance" in severe terms: "But maintaining 'ethnic balance' is not fine. It is chillingly,