> That is, private individual actions don’t increase at a rate sufficient to affect the problem in a timely fashion; collective action seeking changes in policy and law can.
This is actually a description of the politics of "special interest groups" and it usually leads to horrible things. If an idea is only supported by 5% of the population, we generally do NOT want that 5% of the population driving the legislative agenda. Instead, ideas need to first gain broad support among the general population, at which point enacting legislation may be desirable in order to solve collective action problems such as preventing free riding.