MB: There are, I believe, four types of commons to distinguish in this context. The first type is the immaterial commons we inherit, such as language and culture. The second type is the immaterial commons we create. This is where the hugely important knowledge and digital commons come in (since it this digital commons that is currently exploding). The third type is the material commons we inherit, the oceans, the atmosphere, the forests, etc.; and the fourth type is the as yet underappreciated potential for the created material commons, i.e. productively manufactured resources.