 Berlin’s emphasis on the subversive, liberating, anti-orthodox nature of philosophy was accompanied by a particular interest in moments of radical change in the history of ideas, and in original, heterodox and often marginal thinkers, while his emphasis on the practical consequences of ideas led him to focus on those transformations and challenges which, in his view, had wrought particularly decisive changes in people’s moral and political consciousness, and in their behaviour. Finally, his concern with the conflicts of his own day led him to concentrate mainly on modern intellectual history, and to trace the emergence of certain ideas that he regarded as particularly important, for good or ill, in the contemporary  world.[9]