What does the narrator suggest has arrived along with the nee religion?

Achebe's portrait of the Christians is as fair and balanced as his portrait of the Igbo; remember that his own parents were Christian missionaries. Although Christian intolerance leads to problems in the beginnings of the new community, Mr. Kiaga's wise and steady leadership is quite admirable.

We also see that the Christians fill a void in clan life; they do great good by rescuing the twins and providing comfort to outcasts. But it is also true that the Christians are the first wave of imperialism. The arrival of the missionaries is the precursor to subjugation.