Parker was born in Birmingham. He quit school at the age of fourteen and never entered formal studies. In the early 1950s he used to "soap-box" at Speaker's Corner in London's Hyde Park, normally just opening the Sunday afternoon meetings of the then London Anarchist Group. He summarized his career as follows: " has worked his way through the Young Communist League, the British Federation of Young Co-operators, and virtually all the different varieties of anarchism, to emerge as his own man, the penny of conscious egoism having finally dropped." In 1993 Parker looked back on his career by comparing his first editorial with a last statement on his position. In 1963, having arrived at individual anarchism, he had written: "If anarchism is not individualist, then it becomes hodge-podge, half-way house between socialist and democratic myths and the impulse to individual sovereignty." The name of his journal, Minus One, was derived from his statement: "Individualist anarchists are people who do not want to be just 'a plus one in the statistical millions.'" Slowly he emancipated himself from "the closed world of anarchists". The "emotional capital" he had invested in anarchism was such "that I did not finally renounce my adherence to it until almost twenty years later ." The anarchism he had finally abandoned was "a creed of social transformation aiming at the ending of all domination and exploitation of man by man", with the "central tenet": "Dominating People Is Wrong". After Parker had changed from individualist anarchist to conscious egoist, and as such, he "can see no reason why I should not dominate others Egoism leaves any way open to me for which I am empowered." Parker closed these final statements with a quotation, not by Max Stirner, but by Ragnar Redbeard. Parker worked from 1961 to 1994 for British Rail. He died in London.
Editor and Author
Parker founded and edited a journal that appeared subsequently under three resp. four different titles:
Minus One
* from September 1963 to 1980, average 10 pp, irregular intervals
EGO ; subtitle: An Individualist Review
* from 1982 to 1993,, average 10 pp
* No. 16/17 was a commemorative issue, celebrating the 150th anniversary of Max Stirner's Der Einzige und sein Eigentum. Parker noted on p. 20: "From the next issue Ego will be incorporated into Non-Serviam which is edited and published by Svein Olav Nyberg. However, I intend to issue occasional 'viewsletters', usually consisting of one or two A4 sized pages." Two of these issues appeared under the title En Marge: No.1, No.2.
One early reaction to Parker's ideas was that of Lyman Tower Sargent, who later became one of the world's foremost scholars on utopian studies. He contributed to Parker's journal Minus One. In the first edition of his book Contemporary political Ideologies he presented Parker as "one of the very few living theorists" of Individualist Anarchism. In later revised editions Parker is no longer mentioned.