Industrial growth in countries had formerly beenmarkets __1__

　　hastened regional self-sufficiency and, in theconsequence, __2__

　　hastened the collapse of organized long-distance trade.This process was intensified by the spread of a newmetal, iron.

　　In almost 1400 B.C. new smelting techniques led to thehigh __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.