Citing specific evidence from Achebe's Things Fall Apart (not from the textbook), how did the appearance of Europeans in the nineteenth century alter/affect Ibo society?

Citing specific evidence from Achebe's Things Fall Apart (not from the textbook), how did the appearance of Europeans in the nineteenth century alter/affect Ibo society? 

• font size 10 or 12 only
• one-inch margins
• double-spaced 
• page number citations for your quoted evidence
• not to exceed one (1) page
• name at the top left 
• must have brief introduction and conclusion paragraphs (each not to exceed two sentences)