How many fundamental forms are there ? To answer that you have to define what makes a form fundamental

However, as I have progressed in my understanding I have discovered to my surprise that almost everything relates back to a mere handful or two of core concepts. Ultimately it is all pretty simply based on the way an energy field expands from a point, and interacts with other energy fields. This is perhaps the most important insight I gained from the work of Buckminster Fuller, (inventor of geodesic domes among other things).