The egwugwu was the "system of government", but was also associated with religion. Not only was it sacred and thought to be a spirit, but it would help people with their every day problems.
The egwugwu is similar to the Grand Jury mixed with a priest.
Odukwe alleges that Uzowulu has been beating his wife.
Yes, the egwugwus are just like judges in today's society. Justice was served the majority of the time. In the example the book gives the reader, a man and his wife go in front of the eqwugwu after the man beats his wife, and "justice is served", because the egwugwu tells the man to stop beating his wife!!