So, I'm currently halfway through my first novel. Unfortunately, I'm kind of stuck. I'm having problems coming up with the climax. I know what I want it to be. There are two main ideas, each represented by a secondary character. My main character has to choose between the two characters and therefore the two ideas. I want them all to come to a head, where the MC is forced to choose a side. I just cant figure out the action or events that would cause this to happen. Here's some details. My novel is science fiction and it deals with a group of scientists exploring a new planet in search of a cure for cancer. They find it, but one side of the group doesn't want to send it back to Earth because they believe that if cancer is cured humans will just go back to fighting each other. The other side see's hope in mankind, and wants to send the cure home. I'm not looking for specific ideas (though if you want to give me some, go ahead). I'm mostly looking for advice on how to build good climaxes and what you might have done in your own novels. I'm stuck becasue I'm supposed to be building towards a climax and I'm not even sure what that will be. I know the idea, just not the action that represents those ideas.