Индейцы зря плодились?

В инете есть теория размноженцев, что мол сила народа зависит от его плодячки: чем больше плодячка тем сильнее народ и наоборот чем меньше плодячка тем народ слабее. И решил я посмотреть как работает эта теория на индейцах Америки:

https://www.google.ru/search?newwindow=1&hl=ru&tbm=bks&ei=c3M0W4qNIonD6QSQpoqYBQ&q=%D0%B2+%D0%B4%D0%BE%D0%BA%D0%BE%D0%BB%D0%BE%D0%BD%D0%B8%D0%B0%D0%BB%D1%8C%D0%BD%D1%83%D1%8E+%D1%8D%D0%BF%D0%BE%D1%85%D1%83+%D1%80%D0%BE%D0%B6%D0%B4%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82%D1%8C+%D0%BD%D0%B0%D1%81%D0%B5%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F+%D0%90%D0%BC%D0%B5%D1%80%D0%B8%D0%BA%D0%B8+%D0%B1%D1%8B%D0%BB%D0%B0+%D0%B2%D1%8B%D1%81%D0%BE%D0%BA%D0%BE%D0%B9%2C+%D0%B1%D0%BB%D0%B8%D0%B7%D0%BA%D0%BE%D0%B9+%D0%BA+%D1%84%D0%B8%D0%B7%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D0%BC%D0%B0%D0%BA%D1%81%D0%B8%D0%BC%D1%83%D0%BC%D1%83%2C+%D0%BF%D0%BE%D1%81%D0%BA%D0%BE%D0%BB%D1%8C%D0%BA%D1%83+%D0%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D1%8C+%D0%B7%D0%B0+%D1%80%D0%BE%D0%B6%D0%B4%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82%D1%8C%D1%8E+%D0%BF%D1%80%D0%B0%D0%BA%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8+%D0%BE%D1%82%D1%81%D1%83%D1%82%D1%81%D1%82%D0%B2%D0%BE%D0%B2%D0%B0%D0%BB.+%D0%A1%D0%BC%D0%B5%D1%80%D1%82%D0%BD%D0%BE%D1%81%D1%82%D1%8C%2C+%D0%BE%D1%87%D0%B5%D0%B2%D0%B8%D0%B4%D0%BD%D0%BE%2C+%D1%82%D0%B0%D0%BA%D0%B6%D0%B5+%D0%B1%D1%8B%D0%BB%D0%B0+%D0%B2%D1%8B%D1%81%D0%BE%D0%BA%D0%BE%D0%B9%2C+%D0%BD%D0%BE+%D0%BE+%D0%B5%D0%B5+%D1%81%D0%BE%D0%BE%D1%82%D0%BD%D0%BE%D1%88%D0%B5%D0%BD%D0%B8%D0%B8+%D1%81+%D1%80%D0%BE%D0%B6%D0%B4%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82%D1%8C%D1%8E+%D1%81%D0%BA%D0%B0%D0%B7%D0%B0%D1%82%D1%8C+%D1%87%D1%82%D0%BE-%D0%BB%D0%B8%D0%B1%D0%BE+%D1%82%D1%80%D1%83%D0%B4%D0%BD%D0%BE%2C+%D0%BF%D0%BE%D1%81%D0%BA%D0%BE%D0%BB%D1%8C%D0%BA%D1%83+%D0%BC%D1%8B+%D0%BD%D0%B8%D1%87%D0%B5%D0%B3%D0%BE+%D0%BD%D0%B5+%D0%B7%D0%BD%D0%B0%D0%B5%D0%BC+%D0%BD%D0%B8+%D0%BE+%D1%87%D0%B8%D1%81%D0%BB%D0%B5%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D0%B8+%D0%BD%D0%B0%D1%81%D0%B5%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F+%D0%B4%D0%BE%D0%BA%D0%BE%D0%BB%D1%83%D0%BC%D0%B1%D0%BE%D0%B2%D0%BE%D0%B9+%D0%90%D0%BC%D0%B5%D1%80%D0%B8%D0%BA%D0%B8%2C+%D0%BD%D0%B8+%D0%BE+%D0%B5%D0%B5+&oq=%D0%B2+%D0%B4%D0%BE%D0%BA%D0%BE%D0%BB%D0%BE%D0%BD%D0%B8%D0%B0%D0%BB%D1%8C%D0%BD%D1%83%D1%8E+%D1%8D%D0%BF%D0%BE%D1%85%D1%83+%D1%80%D0%BE%D0%B6%D0%B4%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82%D1%8C+%D0%BD%D0%B0%D1%81%D0%B5%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F+%D0%90%D0%BC%D0%B5%D1%80%D0%B8%D0%BA%D0%B8+%D0%B1%D1%8B%D0%BB%D0%B0+%D0%B2%D1%8B%D1%81%D0%BE%D0%BA%D0%BE%D0%B9%2C+%D0%B1%D0%BB%D0%B8%D0%B7%D0%BA%D0%BE%D0%B9+%D0%BA+%D1%84%D0%B8%D0%B7%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D0%BC%D0%B0%D0%BA%D1%81%D0%B8%D0%BC%D1%83%D0%BC%D1%83%2C+%D0%BF%D0%BE%D1%81%D0%BA%D0%BE%D0%BB%D1%8C%D0%BA%D1%83+%D0%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D1%8C+%D0%B7%D0%B0+%D1%80%D0%BE%D0%B6%D0%B4%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82%D1%8C%D1%8E+%D0%BF%D1%80%D0%B0%D0%BA%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8+%D0%BE%D1%82%D1%81%D1%83%D1%82%D1%81%D1%82%D0%B2%D0%BE%D0%B2%D0%B0%D0%BB.+%D0%A1%D0%BC%D0%B5%D1%80%D1%82%D0%BD%D0%BE%D1%81%D1%82%D1%8C%2C+%D0%BE%D1%87%D0%B5%D0%B2%D0%B8%D0%B4%D0%BD%D0%BE%2C+%D1%82%D0%B0%D0%BA%D0%B6%D0%B5+%D0%B1%D1%8B%D0%BB%D0%B0+%D0%B2%D1%8B%D1%81%D0%BE%D0%BA%D0%BE%D0%B9%2C+%D0%BD%D0%BE+%D0%BE+%D0%B5%D0%B5+%D1%81%D0%BE%D0%BE%D1%82%D0%BD%D0%BE%D1%88%D0%B5%D0%BD%D0%B8%D0%B8+%D1%81+%D1%80%D0%BE%D0%B6%D0%B4%D0%B0%D0%B5%D0%BC%D0%BE%D1%81%D1%82%D1%8C%D1%8E+%D1%81%D0%BA%D0%B0%D0%B7%D0%B0%D1%82%D1%8C+%D1%87%D1%82%D0%BE-%D0%BB%D0%B8%D0%B1%D0%BE+%D1%82%D1%80%D1%83%D0%B4%D0%BD%D0%BE%2C+%D0%BF%D0%BE%D1%81%D0%BA%D0%BE%D0%BB%D1%8C%D0%BA%D1%83+%D0%BC%D1%8B+%D0%BD%D0%B8%D1%87%D0%B5%D0%B3%D0%BE+%D0%BD%D0%B5+%D0%B7%D0%BD%D0%B0%D0%B5%D0%BC+%D0%BD%D0%B8+%D0%BE+%D1%87%D0%B8%D1%81%D0%BB%D0%B5%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D0%B8+%D0%BD%D0%B0%D1%81%D0%B5%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F+%D0%B4%D0%BE%D0%BA%D0%BE%D0%BB%D1%83%D0%BC%D0%B1%D0%BE%D0%B2%D0%BE%D0%B9+%D0%90%D0%BC%D0%B5%D1%80%D0%B8%D0%BA%D0%B8%2C+%D0%BD%D0%B8+%D0%BE+%D0%B5%D0%B5+&gs_l=psy-ab.3...10435.10908.0.11264.1.1.0.0.0.0.0.0..0.0....0...1c.1.64.psy-ab..1.0.0....0.obJ3Ctacicw

"в доколониальную эпоху рождаемость населения Америки была высокой, близкой к физиологическому максимуму, поскольку контроль за рождаемостью практически отсутствовал. Смертность, очевидно, также была высокой, но о ее соотношении с рождаемостью сказать что-либо трудно, поскольку мы ничего не знаем ни о численности населения доколумбовой Америки, ни о ее"

Я не понял: индейцы что зря плодились?

Где задавливание европейских колонизаторов индейской плодячкой?