Although I've only played through a few games, I've found plenty of players who are willing to ally and/or make peace. Usually this is because one person is dominating the game and will win if the others don't ally together, and this usually happens in map where there are a lot of players and not as much space to move around and neutral countries to use as buffers.
In my last two games, I won by forming alliances with other players, and we all shared the SP together!