It is said that when railways were first opened in Spain, peasants standing on the tracks were not unfrequently run over; and that the blame fell on the engine-drivers for not stopping: rural experiences having yielded no conception of the momentum of a large mass moving at a high velocity.
The incident is recalled to me on contemplating the ideas of the so-called “practical” politician, into whose mind there enters no thought of such a thing as political momentum, still less of a political momentum which, instead of diminishing or remaining constant, increases. The theory on which he daily proceeds is that the change caused by his measure will stop where he intends it to stop. He contemplates intently the things his act will achieve, but thinks little of the remoter issues of the movement his act sets up, and still less its collateral issues.
Herbert Spencer, The Man versus the State (1884).
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Herbert Spencer
