Anthony Gregory maintains that libertarianism "can refer to any number of varying and at times mutually exclusive political orientations." Gregory describes left-libertarianism as maintaining interest in personal freedom, having sympathy for egalitarianism and opposing social hierarchy, preferring a liberal lifestyle, opposing big business and having a New Left opposition to imperialism and war. Although some American libertarians such as Walter Block, Harry Browne, Leonard E. Read and Murray Rothbard may reject the political spectrum (especially the left–right political spectrum) whilst denying any association with both the political right and left, other American libertarians such as Kevin Carson, Karl Hess, Roderick T. Long and Sheldon Richman have written about libertarianism's left-wing opposition to authoritarian rule and argued that libertarianism is fundamentally a left-wing position. Rothbard himself previously made the same point, rejecting the association of statism with the left.