Unjustly Underrated!

Rating: 10/10 (4 September 2018)

The first two films were for most part, historical in nature. They did not place as many demands on the viewer to be aware of anything beyond basic common knowledge of the eras in which the stories took place. The stories told in these first two films are interwoven around the reality of their respective time periods; many American immigrants received new names at Ellis Island, that little desert town in Nevada truly evolved out of vice and corruption, the drug trade began in earnest after WWII and so on...
Part three, at the time of its release required an understanding of real world recent events as the story was set in the time of its release and weaved the plot though some very real and controversial events of the time. Lest you forgot, Roberto Calvi, a banker with close Vatican ties, truly was found hanging under Blackfriar's Bridge in London England in 1982.
The only real fault one could claim was that the story could not be told in one film if it had to spend extra effort explaining the links between recent events and the "family business".
Personally, I enjoy being challenged by a film in this manner and found the continuation of the story and its conclusion very effective and satisfying.