AMMDI is an open-notebook hypertext writing experiment, authored by Mike Travers aka mtraven. It's a work in progress and some parts are more polished than others. Comments welcome! More.
The basic thesis is that cancer is an evolutionary process and should be understood as one, or as part of the more general process of evolution. Cells mutate, cause changes in their behavior that affect survival and reproduction. Those are the ingredients needed for natural selection to operate.
Of course cells reproduce much faster in greater parallelism than individual large organisms.
While this seems obviously true once pointed out, it has some non-obvious consequences. Eg, it means cancer can never be cured, because it is an integral part of the processes of life.