Madison Grant,
The Conquest of a Continent; or…
“ This frequently does not result in a well-balanced permanent population, and the real settlement of South Dakota dates from the succeeding period when its prairie lands were taken up by wheat growers from the States of the upper Mississippi Valley. The wheat industry in Wisconsin gradually died during the decade of 1870-80, and many who found the ground unprofitable there moved farther west, as did others with similar motives from western New York and the States of the old Northwest Territory.South Dakota has a slightly higher percentage of old Americans than its sister to the north ”
