why the bronze age kingdoms collapse

Bronze Age Collapse: Pollen Study Highlights Late Bronze Age Drought

Featuring sidebars on pollen analysis and the collapse of Bronze Age cities fromBiblical Archaeology Review and Archaeology Odyssey

Noah Wiener   •  10/22/2013

Sites destroyed in the Bronze Age collapse around 1200 B.C.E.

During the Late Bronze Age (1500–1200 B.C.E.), the Eastern Mediterranean boasted a flourishing network of grand empires sustaining sophisticated infrastructures, the likes of which the world would not see again for centuries to come. An interregional destruction (attested in Greece, Turkey, Israel, Syria, Lebanon and Egypt) known as the Bronze Age collapse is one of archaeology’s greatest mysteries.

In the Archaeology Odyssey article “When Civilization Collapsed: Death of the Bronze Age,” William H. Stiebing describes the Late Bronze Age collapse:

It was a cataclysm of immense proportions: Near the end of the 13th century B.C.E., the great Bronze Age civilizations of the Aegean and Near East suddenly collapsed. In the latter part of the Late Bronze Age (c. 1400–1200 B.C.E.), Mycenaean civilization flourished in Greece and Crete. The Hittites controlled most of Anatolia and northern Syria from their capital at Hattusa. The Egyptian New Kingdom ruled not only in the Nile Valley but also in Palestine and southern Syria. Commerce flowed over trade routes that crisscrossed both land and sea. A late-14th-century B.C.E. ship excavated off the Uluburun promontory in southern Turkey, for example, carried cargo from Cyprus, Canaan, Egypt, Anatolia and Mycenaean Greece. A century later, all these civilizations had begun to unravel. Cities burned, trade became almost nonexistent, and large groups of people migrated from one place to another.

for the rest of the article, pls read below:

http://www.biblicalarchaeology.org/daily/ancient-cultures/ancient-near-eastern-world/bronze-age-collapse-pollen-study-highlights-late-bronze-age-drought/