The document discusses social innovation and theories of change. It outlines two quasi-opposite approaches to generating change - one symbolic and collective, the other aggregative and networked. Social innovation suggests that there is no total solution, only iteration and nonlinearity over time. It is a matter of hybridization and cross-pollination of ideas. For real change to occur, risks must be taken to engage influential actors, enzymes like translators and boundary spanners are needed to accelerate change by reducing friction and bringing groups together.