“The Next 100 Years,” which was published some 15 years ago, forecast the emergence of three significant powers over the next few decades: Japan, Poland and Turkey. Japan’s stable and growing economy and its focus on military development evince a steady, if quiet, growth in its power. Poland is now the fifth-largest economy in Europe and a Continental leader in military development. Yet both countries are constrained by major powers. Japan must contend with China, and Poland must contend with Russia, located as it is on the rear of Ukraine.