 There are several reasons, as already noted, why revolutionary wars may be especially hard to justify. The most obvious, as noted in Section 3, are that there are many ways in which the aim of establishing a more just political order may be frustrated and hence it may be hard to satisfy the requirement of a reasonable likelihood of success. Another problem is the difficulty of determining that a proportionality requirement is satisfied. Indeed, some of the most daunting moral issues of revolutionary war arise when one attempts to apply the standard just war requirement of proportionality as a necessary condition for justified initiation of revolutionary war. 