A great emigration necessarily implies unhappiness of some kind or other in the country that is deserted.
Man cannot live in the midst of plenty.
The superior power of population cannot be checked without producing misery or vice.
Capitals accumulate faster than population
To prevent the recurrence of misery is, alas! beyond the power of man.
Instead of recommending cleanliness to the poor, we should encourage contrary habits. In our towns we should make the streets narrower, crowd more people into the houses, and court the return of the plague.