. Renewal of Life by Transmission. The most notable distinction between living and inanimate things is that the former maintain themselves by renewal. A stone when struck resists. If its resistance is greater than the force of the blow struck, it remains outwardly unchanged. Otherwise, it is shattered into smaller bits. Never does the stone attempt to react in such a way that it may maintain itself against the blow, much less so as to render the blow a contributing factor to its own continued action. While the living thing may easily be crushed by superior force, it none the less tries to turn the energies which act upon it into means of its own further existence. If it cannot do so, it does not just split into smaller pieces (at least in the higher forms of life), but loses its identity as a living thing. As long as it endures, it struggles to use surrounding energies in its own behalf. It uses light, air, moisture, and the material of soil. To say that it uses them is to say that it turns them into means of its own conservation. As long as it is growing, the energy it expends in thus turning the environment to account is more than compensated for by the return it gets: it grows. Understanding the word "control" in this sense, it may be said that a living being is one that subjugates and controls for its own continued activity the energies that would otherwise use it up. Life is a self-renewing process through action upon the environment.
2014 Reprint of 1894 Edition. Full facsimile of the original edition. The "Frontier Thesis" or "Turner Thesis," is the argument advanced by historian Frederick Jackson Turner in 1894 that American democracy was formed by the American Frontier. He stressed the process-the moving frontier line-and the impact it had on pioneers going through the process. He also stressed consequences of a ostensibly limitless frontier and that American democracy and egalitarianism were the principle results. In Turner's thesis the American frontier established liberty by releasing Americans from European mindsets and eroding old, dysfunctional customs. The frontier had no need for standing armies, established churches, aristocrats or nobles, nor for landed gentry who controlled most of the land and charged heavy rents. Frontier land was free for the taking. Turner first announced his thesis in a paper entitled "The Significance of the Frontier in American History," delivered to the American Historical Association in 1893 in Chicago. He won very wide acclaim among historians and intellectuals. Turner's emphasis on the importance of the frontier in shaping American character influenced the interpretation found in thousands of scholarly histories. By the time Turner died in 1932, 60% of the leading history departments in the U.S. were teaching courses in frontier history along Turnerian lines.
When first published, Marshall McLuhan's Understanding Media made history with its radical view of the effects of electronic communications upon man and life in the twentieth century.