What was the most significant cause of the Ilkhanate's collapse? point) The Ikhanate collapsed because it was devastated by the bubonic plague. The Ikhanate collapsed because of the its support of Sufism The collapsed because of internal revolts by the Han Chinese. The likhanate collapsed because the ruler did not have a male heir .

The most significant cause of the Ilkhanate's collapse was internal revolts by the Han Chinese.