The Inertial Theory of Political Change: A Gravitational Model of Mass-Leader Dynamics

The paper presents the Inertial Theory of Political Change (ITPC), a conceptual framework that characterizes collective movements within the political space through two primary mechanisms: drift, resulting from uncoordinated mass behavior over long time scales similar to Brownian motion, and displacement, generated by coordinated leadership actions during specific windows of opportunity, inspired by Machiavelli's concept of occasione. The influence exerted by leaders is formalized as a distance-dependent attraction, akin to a gravitational force rather than a uniform influence, and is modulated by factors such as positional rigidity and political imprinting. Furthermore, the model incorporates anisotropic rigidity, which denotes resistance to movement that varies across different dimensions. The preprint is intended as a conceptual and analytical contribution. It derives falsifiable implications regarding polarization dynamics, leader hierarchy, and variation in the velocity and direction of political change, while explicitly deferring empirical operationalization and testing to future work.