Why would a confederate system of government most likely unify under central authority?

A confederate system of government, characterized by a loose association of independent states, may unify under central authority to achieve greater efficiency and effectiveness in governance. This centralization can enhance coordination on issues like defense, trade, and infrastructure, which may be challenging for individual states to manage alone. Additionally, external pressures or internal conflicts can motivate states to consolidate power to ensure stability and security. Ultimately, the desire for a more cohesive national identity and the benefits of collective action often drive this shift toward central authority.