 There is one other aspect that bears mentioning. So far the focus has been on what might term a vertical dimension (how well off the members of generations in the future [at, say, t10] are when compared to earlier generations [at, say, t1]). This does not, however, exhaust questions of intergenerational justice for one might think that members of one generation should also be concerned about the likely distribution within any future generation (so, what we might term a horizontal dimension). Those who adopt an egalitarian perspective, for example, might think that current generations have a duty to act in such a way that they do not create stark inequalities within future generations (Caney 2018a: 161–162 &amp; 168; see also Fleurbaey et al. 2019: 93). This is relevant in this context because climate change tends to exacerbate existing inequalities (Hoegh-Guldberg, Jacob, &amp; Taylor 2019: 244).