"Heterodox doctrines, in economics and elsewhere, often fail to get adequately discussed in their formative stages: both the intellectual and the political establishment tend to regard them as unworthy of notice. Meanwhile, those doctrines can seem compelling to large numbers of people (some of whom may have considerable political clout, large financial resources, or both). By the time it becomes apparent that such influential ideas demand serious attention after all, reasoned argument has become very difficult. People have become invested emotionally, politically, and financially in the doctrine; careers and even institutions have been built on it; and the proponents can no longer allow themselves to contemplate the possibility that they have taken a wrong turning."
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