Would Neri have made any worse a Don than Sonny?
Or am I under-estimating Sonny?
Sonny was able to organize soldiers on the basis of loyalty. Vito must have introduced him to many of his political friends.
Neri, on the other hand, is a bulldog. Even during the conversation with Geary it's clear that Neri's only function is to check him out where to bite.
In the novel Neri is mentioned after the Moe Greene meeting:
Michael turned to Neri and said, “Did you make him good?” Neri tapped his forehead. “I got Moe Greene mugged and numbered up here.”
