To start with, it has been argued that the Hekla 3 eruption occurred almost as the same time with this collapse and thus had a part to play in the collapse. It has been argued that there were major earthquakes in Egypt during this period and this may have contributed to the collapse. There were raids, which resulted to migration and later to the collapse. The evidence of the raids is the Naue II type swords, which came from southeastern Europe.
Additionally, the Egyptians were invading the northerners leading to wars. There are Linear B documents, which evidences rise in salve raids and piracy especially around Anatolia (ibid, 495).