The dawn of bronze — particularly between 3300 and 1200 B.C. — coincided with the rise of some of the world’s earliest civilizations, most notably that of the ancient Sumerians and Egyptians. The alloy, which combines tin and copper, was stronger than the metals that came before it, and made for better tools used in hunting, war, agriculture and construction. As societies modernized, things like art, language and culture thrived and advanced; then that momentum came to a sudden halt.