What's "Left"?

From Introducing the Movement of the Libertarian Left, by Samuel Edward Konkin III:

"Left," from earliest political times, has meant "anti-establishment." Consistent libertarians wish to abolish the State and its parasitic class of bureaucrats, politicians, subsidized businessmen, privileged labor leaders, and military mass murderers. This puts us, in most political lexicons, on the Left; since it is anarchist, it places us on the Far Left.