 One challenge for this view will, of course, be determining how to specify this threshold. Many, however, will grant that a sufficiency condition is necessary even if it is hard to specify. Some may though query whether it is sufficient. For example, a sufficientarian view would allow members of one generation to leave future generations worse off than them just so long as they are above a certain threshold. This will strike many as too weak. Consider a case where one generation could leave future people much better off than the sufficientarian threshold at no (or little) cost. Here it would seem inadequate to say that current generations need only ensure that future people do not fall beneath the sufficientarian’s designated threshold.