IN the long run, reformers are more dangerous than revolutionaries. Calm and reasonable, they provoke little opposition, or mainly such as is equally cool and compromising.  They change things a bit at a time, less quickly than they like, constantly bewailing the durability of vested interests and entrenched institutions. Yet all the while, without the difference being forced on people’s attention, life is altered, becoming better perhaps in some details and worse perhaps as a whole. Where revolution, being blatant, often fails, reform is insidious and too often succeeds.