The Silk Roads were made up of an indirect chain of separate transactions through which goods crossed the entire land area of Eurasia. Rarely did merchants themselves travel the length of these routes; in fact, few of them knew the complexity and breadth of the Silk Roads. Merchants primarily engaged in local instances of "relay trade" in which goods changed "hands many times before reaching their final destinations."[1] Because the Silk Roads crossed land it was much more expensive and dangerous to move goods. Consequently, trade focused on luxury items that would bring a nice profit making the greater risks worthwhile. Particularly important were luxury items with a high value to weight ratio.
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C. Three equal branches with different powers
Well in this period, it is considered the old stone age and for good reason, as this era is characterized by the use of rudimentary chipped stone tools. Basically it was the era when human started using tools that were made from stone. Or in other words, innovated.
War want very popular with the public and with most politicians <span />