Landscape — the external surface of the earth beneath the atmosphere… is merely an outward manifestation of most of the factors at work in the area.
Although the roots of geography, as a field of study, reach back to Classical Antiquity… its establishment as a modern science was essentially the work of the century from 1750 to 1850. The second half of this period, the time of Humboldt and Ritter, is commonly spoken of as the "classical period" of geography.
Geography is not an infant subject, born out of the womb of American geology a few decades ago, which each new generation of American students may change around at will.