Suggestion:
Each major group (subtopic) connected to the main topic, then has a separate map, for example like >>395850 suggested:
CIA
FBI
corruption
human trafficking
etc.
Not sure , but it would seem a good idea to make ones for the people, businesses (Sidley Austin) and foundations (The Asia Foundation, politician's foundations) that Q has mentioned specifically.
So you have 1 large map, and then the subtopics each have their own maps on which you can add the links to actual proofs.