India's 20-year itch

Whichever way one looks at it, there is no denying that Arvind Kejriwal and Narendra Modi have changed Indian politics in a fundamental way. But they are not the first to do so. If you look at Indian politics since it started in earnest in the mid-1890s, you will find that it has a roughly 20-year cycle. Approximately after every two or so decades it undergoes a convulsion that changes it forever.

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