Answer the question at the end by quoting:

Arbi Alautdinovich Barayev (Chechen: Arbi Alautdinovich Baraev; 27 May 1974 - 22 June 2001) was a Chechen warlord, who in 1996 became the founder and first leader of the Special Purpose Islamic Regiment (SPIR) in Chechnya. Nicknamed The Terminator, Barayev and the SPIR were regarded as one of the main violent criminal organizations operating in Chechnya during the lawless interwar period that followed the 1994-1996 First Chechen War, driving out foreign journalists and humanitarian workers, while undermining the presidency of Aslan Maskhadov during Chechnya's de facto independence until 1999. After the restoration of Russian Federal control, Barayev openly lived in his home village until he was killed on 22 June, 2001.
In August 1999, Russia launched the Second Chechen War in response to the Invasion of Dagestan by the Islamic International Brigade. Dagestan borders Chechnya to the east, and as part of the operation Russian troops entered Chechnya on 1 October to restore federal control over the country, effectively ending its de facto independence. In March 2000, during the early phase of the war, Barayev reportedly betrayed the Chechen field commander Ruslan Gelayev to the Russian military forces, resulting in the massacre of Gelayev's forces in the Battle of Komsomolskoye. According to another version, Barayev and his men merely bribed their way out of Komsomolskoye while leaving Gelayev and his people to their fate. The incident led to the declaration of revenge on the part of Gelayev, whose fighters then blew up several houses belonging to Barayev in his home village of Alkhan-Kala near Grozny, killed a number of his men, and even attempted to assassinate Barayev in Ingushetia. According to federal authorities, more than 40 Chechens died as a result of these clashes. Chechen surgeon Khassan Baiev, who amputated a portion of the leg of Shamil Basayev after his injury on a minefield, also had operated on Salman Raduyev and Arbi Barayev himself, however Barayev promised to kill him because he would also help wounded Russian soldiers. Baiev described Barayev as "a born killer, and his men were desperados with blood vendettas proclaimed against them for murder. They joined Barayev for protection against the avengers in an endless cycle of violence. ... He owned a stable of expensive foreign cars, had several wives, and moved around with an escort of twenty to thirty guards. Everyone assumed that he was in the pay of Russian intelligence. Relatives of Arbi Barayev publicly denounced him for his crimes, saying that the family announced in the courtyard of the mosque that if anyone killed him, they would relinquish all claims. There would be no blood revenge." Facing death threats from Barayev as well as from the federal side, Baiev was eventually forced to seek political asylum in the United States. Following the Russian occupation of most of Chechnya, Barayev freely lived in Alkhan-Kala and frequently passed through Russian Army checkpoints without any problems, using identity papers of an FSB officer, and was also not included in the lists of people wanted "for participation in illegal armed groups". Once arrested, Barayev was said to be instantly released by the demand of Beslan Gantamirov, then the leading figure in the pro-Moscow government. In May 2000, the Russian military intelligence GRU officer leaked papers about Barayev's affiliation with FSB to a Chechen journalist. In April 2001, Barayev's men allegedly ambushed and killed Viktor Popkov, a Russian dissident working in Chechnya as an aid worker and human rights activist since 1995, in the close vicinity of a military roadblock. According to the United States Department of State, Barayev sent a group of his fighters to train in Taliban-controlled areas of Afghanistan in the spring of the same year.

Who was Arbi Barayev?

Barayev reportedly betrayed the Chechen field commander Ruslan Gelayev to the Russian military forces,

Answer the question at the end by quoting:

Roberto Mangabeira Unger (; born 24 March 1947) is a philosopher and politician. He has developed his views and positions across many fields, including social, political, and economic theory. In legal theory, he is best known by his work in the 1970s and 80s while at Harvard Law School as part of the Critical Legal Studies movement, which is held to have helped disrupt the methodological consensus in American law schools. His political activity helped the transition to democracy in Brazil in the aftermath of the military regime, and culminated with his appointment as Brazil's Minister of Strategic Affairs in 2007 and again in 2015.
The beginning of Unger's academic career began with the books Knowledge and Politics and Law in Modern Society, published in 1975 and 1976 respectively. These works led to the co-founding of Critical Legal Studies (CLS) with Duncan Kennedy and Morton Horwitz. The movement stirred up controversy in legal schools across America as it challenged standard legal scholarship and made radical proposals for legal education. By the early 1980s, the CLS movement touched off a heated internal debate at Harvard, pitting the CLS scholars against the older, more traditional scholars. Throughout much of the 1980s, Unger worked on his magnum opus, Politics: A Work In Constructive Social Theory, a three volume work that assessed classical social theory and developed a political, social, and economic alternative. The series is based on the premise of society as an artifact, and rejects the necessity of certain institutional arrangements. Published in 1987, Politics was foremost a critique of contemporary social theory and politics; it developed a theory of structural and ideological change, and gave an alternative account of world history. By first attacking the idea that there is a necessary progression from one set of institutional arrangements to another, e.g. feudalism to capitalism, it then built an anti-necessitarian theory of social change, theorizing the transition from one set of institutional arrangements to another. Unger devoted much of the following decades to further elaborating on the insights developed in Politics by working out the political and social alternatives. What Should Legal Analysis Become? (Verso, 1996) developed tools to reimagine the organization of social life. Democracy Realized: The Progressive Alternative (Verso, 1998) and What Should the Left Propose? (Verso, 2005) put forth alternative institutional proposals.

Which school did he attended?
legal schools across America