 Some philosophers have argued that a commitment to preventing dangerous climate change requires adopting policies designed to limit or reduce world population size (Cafaro 2012; Cripps 2015). Their argument is that population growth is one of the main factors contributing to climate change. Other things being equal, more people result in more emissions, so, given the direness of the situation policies need to be implemented which will sufficiently lower world population size. Some—like Sarah Conly—argue, on this basis, each couple has a right to no more than one child (Conly 2016). 