Adnan Khashoggi, a Saudi middleman-for-hire who amassed huge wealth and influence peddling everything from American weapons to favors for Riyadh’s rulers and CIA spymasters, only to see his fortunes collapse amid the Iran-contra affair and other scandals, died June 6 at a hospital in London. He was 81, by most accounts. The cause was complications from Parkinson’s disease, the family said in a statement reported by the Associated Press. Mr. Khashoggi’s name may have lost its luster since his peak in the 1970s and 1980s, but not so the list of misdeeds and abuses that remain defining events of the...