From basic American or Lockean or classical liberal values, Spooner (1808-1887) proves that anarchism follows. Proves it, I say. The killerest of the American individualists. If we have equal unalienable rights, anarchism follows immediately and obviously.

lysanderspooner.org

Our best writer, maybe. The assertion that he's an (individualist) anarchist is based on "Civil Disibedience," but Thoreay expresses these positions throughout his authorship.

The first person to call himself an 'anarchist' (that we know of), and a central transitional figure between Rousseau and Marx. His 'mutualism' might still be a decent way between individualism and collectivism.

supplement to the Warren episode. Abolitionism as the source of American anarchism. John Stuart Mill.

The continuity with Godwin is provided by Robert Owen and the astonishing Frances (Fanny) Wright. Warren (1798-1874) was the founder of American individualist anarchism, but...let's talk about the meaning of individualism and collectivism.

A supplement to the Godwin episode. I argue that anarchists need not have a naively positive view of human nature. Not at all, though Godwin and Emma Goldman did, and though for example absolutist Thomas Hobbes had a very negative one. But anarchism follows from Hobbes's view too, believe it or not. Or if Hobbes is right about human nature, anarchism is just as or more valid than if we're all benevolent Godwinians.

The first great "philosophical" or non-religious anarchist in the West, author of the novel Caleb Williams or Things as They Are, and the still underrated classic  An Enquiry Concerning Political Justice. Thomas Paine and Mary Wollstonecraft (whom he married and with whom he had a daughter [Mary Shelley]) are major influences.

Gerrard Winstanley and Levellers, but a whole long history including Thomas Müntzer and the German Peasants' Rebellion. Anabaptists, Diggers, Ranters, Quakers and the origin of modern egalitarianism and anti-authoritarianism.

And also Zhuangzi (Chuang Tzu). Ancient Daoism is a beautiful and profound underpinning for ant-statist political philosophy.

the most wonderful anti-authoritarian philosopher in western history

the book i mention is 'fearless speech' by michel foucault