we can formulate some questions to guide a decision about whether or not to stage an upstream intervention. Has an intervention been tried before that’s similar to the one we’re contemplating (so that we can learn from its results and second-order effects)? Is our intervention “trial-able”—can we experiment in a small way first, so that the negative consequences would be limited if our ideas are wrong? Can we create closed feedback loops so that we can improve quickly? Is it easy to reverse or undo our intervention if it turns out we’ve unwittingly done harm?
