Every since reading my independent study book, "The Sound and the Fury," I've looked at literature a somewhat of a new light in terms of how the narrative style can work to further advocate a message or motif within a novel. As it so happened, I was searching for supplemental information on Achebe a couple of nights ago and I came across something interesting. "Things Fall Apart" definitely seems to be in 3rd Person, omniscient, allowing us to see into the minds and perspectives of multiple characters. Now this might be a bit of a stretch. We've established before hand that African culture is in no way one single thing, in fact African culture is technically incorrect in this sense. It's not homogenous. Likewise, neither is the narrative style of Achebe's work in that it gives multiple outlooks from different characters.
Here's one of the websites I remembered when I was doing my research: http://www.africa.ufl.edu/asq/v4/v4i3a1.htm