In linear processes, such as mathematics, 1+1 must equal 2. In creative processes, such as writing songs or creating art, 1+1 can equal 3 (and sometimes more).
The interesting thing about creativity is that when all participants put aside matters of the ego the end result will always be greater than the individual parts.
But when an individual believes he brings more value than others, disharmony follows. The results is that 1+1 becomes 1-1 and the net result is zero.