People systematically overlook subtractive changes.

Improving objects, ideas or situations-whether a designer seeks to advance technology, a writer seeks to strengthen an argument or a manager seeks to encourage desired behaviour-requires a mental search for possible changes. We investigated whether people are as likely to consider changes that subtract components from an object, idea or situation as they are to consider changes that add new components. People typically consider a limited number of promising ideas in order to manage the cognitive burden of searching through all possible ideas, but this can lead them to accept adequate solutions without considering potentially superior alternatives.

If humans design the planet: A call for psychological scientists to engage with climate engineering.

As efforts to control climate change gain momentum, so too does the possibility that some global actor(s) will deploy one or more forms of climate engineering. Climate engineering refers to large-scale and deliberate activities intended to change either the carbon-balance or energy-balance of the planet. Climate engineering approaches are untested, involve deep uncertainty, and have far-reaching consequences.