It seems that after 1977 (when Adam Monroe was locked up), factions started to form as he had help locating shanti virus strain 138, here is what it looks like:
The "Adam Monroe - Let's bring an apocalypse and make most humans die" faction (1977-2006)
Daniel Linderman - He thought that Adam had the right idea, but needed to cause a lot of deaths on a smaller scale, a city rather than a global scale.
Maury Parkman - He had the ability to locate the virus by scanning minds.
Angela Petrelli - She originally supported Adam Monroe, but eventually decided he was going a bit too far.
The "Heal the world by nuking it" faction (1977-2006)
Daniel Linderman - A great manipulator that approves of a living nuclear weapon, but not an apocalyptic virus.
Angela Petrelli - She supported Linderman as it would eventally lead to Nathan becoming president.
Bob Bishop - He wouldn't be in the position that he was after "Four months later...", if he wasn't on Linderman's good side.
The "Save the world from the Armageddon Party" (19XX-2007)
Charles Deveaux - He believed that Peter would be "the one they need" for his compassion, more than Nathan for his strength and didn't approve of nuking New York just to improve Nathan's political career.
Kaito Nakamura - He didn't approve of Lniderman's small nuclear holocaust plan, he wanted no part of it, in fact, one reason why his stock is "in the toilet" is Linderman pulled some strings to achieve that goal to punish Kaito for his disloyalty, for his feelings of guilt, for trying to make up for the dark deeds that he did, aiding Hiro gave him the means to at least try to make up for them.
