Industrial growth in countries had formerly been markets __1__ hastened regional self-sufficiency and, in the consequence, __2__ hastened the collapse of organized long-distance trade. This process was intensified by the spread of a new metal, iron.In almost 1400 B.C. new smelting techniques led to the high __3__ temperatures which could produce an iron superior in strength to bronze. Probably developing in northeastern __4__ Turkey, this process spread over Europe considerately more __5__ rapidly than the art of processing bronze.This rapid spread was due not only particularly war and the movements __6__ of people, but chiefly, to the wide occurence of iron ore as well. __7__ Iron was available for smelting in almost every land and, in efficiency,iron forging offered almost every country the __8__ prospect of economical self-sufficiency. It was eagerly seized __9__ upon, and the bottom fell out of the bronze market and the　general economics. Trade stagnated, ships were laid up, and __10__ a recession set in.

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