Striking the right balance between private and public power is the fundamental challenge of our age. Find the sweet spot -- prudent regulation, empowering citizens to compete, fostering economic dynamism, and fairness for all -- and your society will thrive in the 21st century. Get the equation wrong, and the results will be measured in social instability, diminishing prosperity, and declining ability to shape your destiny. Choices that seem entirely domestic in nature will have massive geopolitical consequences.