Here are three key points of comparison between Yeats' poem "The Second Coming" and Achebe's novel Things Fall Apart:
1. Both works deal with the breakdown of traditional societies and cultures due to external forces. In the poem, Western civilization is predicted to fall into chaos, while the novel depicts the collapse of traditional Igbo culture through British colonialism.
2. Religion plays an important role in both works. In the poem, references are made to the spiritus mundi and Bethlehem, while the novel focuses on the traditional Igbo religious system. Both explore the clash between traditional and introduced faiths.
3. Both invoke a sense of impending doom and chaos. The poem's ominous imagery like the