Cover -- Guest editorial -- Facing disaster: the great challenges framework -- Complexity, creeping normalcy and conceit: sexy and unsexy risks -- Long-term trajectories of human civilization -- There is plenty of time at the bottom: the economics, risk and ethics of time compression -- Islands...

Purpose: This paper formalizes long-term trajectories of human civilization as a scientific and ethical field of study. The long-term trajectory of human civilization can be defined as the path that human civilization takes during the entire future time period in which human civilization could...

Consider the simple question 'Imagine you and several others are to share a valuable resource; what allocation would you find maximally unfair?' Recent theoretical and empirical work of Eriksson and Simpson (in press) suggests that responses to this question taps important individual differences...

Using a common pool resource game protocol with voting we examine experimentally how cooperation varies with the level at which (binding) votes are aggregated. Our results are broadly in line with theoretical predictions. When players can vote on the behavior of the whole group or when leaders...