patriarchy, heterosexism, white supremacy, and imperialism". Anarchist schools of thought disagree on the methods by which these forms should be opposed. Equality Anarcho-capitalists believe that inequality is not a major concern so long as everyone has equality of opportunity. Anarcho-capitalist Murray Rothbard argued that "the 'rightist' libertarian is not opposed to inequality". Mises Institute author W. Duncan Reekie argue that because of a person's self-ownership, any freedom given up in a laissez-faire marketplace would be a voluntary contract and that there is nothing authoritarian about capitalist employer–employee relationships in such a condition, writing: "There is nothing authoritarian, dictatorial or exploitative in the relationship. Employees order employers to pay them amounts specified in the hiring contract just as much as employers order employees to abide by the terms of the contract". According to anarchist Peter Sabatini, anarcho-capitalists see "nothing at all wrong with the amassing of wealth, therefore those with more capital will inevitably have greater coercive force at their disposal, just as they do now". Rothbard defined equality as "A and B are 'equal' if they are identical to each other with respect to a given attribute. [...] There is one and only one way, then, in which any two people can really be 'equal' in the fullest sense: they must be identical in all their attributes". Rothbard argued that "men are not uniform, that the species, mankind, is uniquely characterized by a high degree of variety, diversity, differentiation; in short, inequality". This runs counter the concept of equality amongst anarchists as they argue that freedom without equality simply gives more freedom to those who are supposedly superior and that equality without freedom is a form of oppression. Collectivist anarchist Mikhail Bakunin famously proclaimed: "We are convinced that freedom without Socialism is privilege and injustice, and that Socialism without freedom is slavery and brutality". With equality meaning equal liberty, Bakunin also argued that "I am truly free only when all human beings, men and women, are equally free. The freedom of other men, far from negating or limiting my freedom, is, on the contrary, its necessary premise and confirmation". As further confirmation of equality's misunderstanding, anarcho-communist Alexander Berkman similarly argued in The ABC of Anarchism: While anarcho-capitalists such as Murray Rothbard consider themselves part of the individualist anarchist tradition, drawing upon the writings of early American individualist anarchists such as Benjamin Tucker and Lysander Spooner while rejecting their normative claims