 By employing a threshold notion of harm which may be understood as a central element of a sufficientarian conception of intergenerational justice  (§4.4),  but could also be an element of other substantive understandings of intergenerational justice  (§4.2  and  §4.3),  we can justify conclusions about both types of present generations’ duties. Basic needs or central capabilities are plausible currencies of a sufficientarian interpretation of intergenerational justice that relies on the threshold notion of harm  (§4.1).  The threshold notion of harm can be understood as a constitutive element of a complex understanding of harm (disjunctive notion)  (§3,  and, in particular,  §3.2).