This chapter begins an analysis of why some constitutional systems have begun again to show militaristic emphases. It argues that in some cases this is to due to the fact that, since the 1980s, one part of the system of world law constructed after 1945 – namely the internal welfare dimension – has been weakened. This is assessed as part of the global background in constitution-making processes that commenced in the 1980s. The chapter considers a range of cases where constitutions have begun to malfunction with military consequences. It divides these cases into constitutions marked by vertical militarization (Russia, Brazil) and constitutions marked by lateral militarization. It links these developments to weakness in social integration processes under different constitutions.