As the fourth industrial revolution (4IR) has become one of the central paths to military modernization, the ability of states to implement military–civil fusion (MCF) will likely factor more in how militaries gain advantages over their rivals. Critical 4IR technologies are increasingly viewed as key force multipliers. Many countries have adopted measures to promote MCF in order to exploit the 4IR for military needs but the implementation of MCF remains challenging. Constraints include differing priorities between the military and commercial sectors when it comes to 4IR and the reluctance of civilian enterprises to enter into technology partnerships with the military. Countries with restrictive, statist approaches toward economic development, such as China and India, may find themselves stymied by a culture that hinders innovation, as opposed to the United States and Israel where entrepreneurism, experimentation, and risk-taking are encouraged. Nevertheless, MCF is likely to become a core military-technological development strategy for most countries seeking great power status or who see technology as a critical force multiplier in national defense.