<span>The paramount factor was simply their vastly superior military technology: "guns" and "horses" mostly, though their metallic armour and greatly refined swords played a secondary role. </span>
The Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population.
It took 60 years as the westward expansion took place from 1801-1861.
Socialism<span> means production to satisfy human needs, not as under capitalism, for sale and profit. </span>Socialism<span> means direct control and management of the industries and social services by the workers through a democratic </span>government<span> based on their nationwide economic organization.</span>
