Federalist No. 21, authored by Alexander Hamilton, focuses on the shortcomings of the Articles of Confederation with respect to the central government's ability to raise revenue, maintain internal order, and enforce laws. The paper serves as a critique of the existing system, laying the groundwork for the arguments in favor of the new U.S. Constitution.One of the key points Hamilton makes is about the inefficacy of the existing system of taxation under the Articles. He argues that the federal government's reliance on requisitions from states is unreliable and ineffective. States often fail to meet their obligations, leading to financial instability at the federal level. Hamilton contends that the new Constitution would remedy this by granting the federal government the authority to levy taxes directly on individuals, thereby ensuring a consistent and reliable source of revenue.Hamilton also addresses the issue of internal order, criticizing the inability of the Articles to maintain peace and stability within the states. He suggests that a stronger central government would be better equipped to handle internal discord, including insurrections and rebellions.Additionally, the paper talks about the absence of a unified system for enforcing laws. Under the Articles, enforcement is left to individual states, leading to inconsistent and often ineffectual implementation. Hamilton argues that the proposed Constitution would solve this problem by creating a federal judiciary and executive with the power to enforce laws uniformly across all states.In summary, Federalist No. 21 serves as an incisive critique of the Articles of Confederation, highlighting their failures in financial, legal, and internal governance. Hamilton uses these criticisms to build the case for the new U.S. Constitution, which he argues would provide a more effective and equitable system of governance. The paper thus emphasizes the need for a stronger central authority capable of addressing the nation's financial, legal, and social challenges.