Liberty is secured, in Hamilton’s view, when the power to make , enforce , and interpret laws is divided so that no single person or body can dominate all three at once, because that concentration is the very definition of tyranny. However, this protection can fail if, in practice, the branches become dependent on each other, collude, or one branch grows so politically powerful (or passive) that it effectively controls the others despite the formal separation.

Hamilton’s core argument

Hamilton builds on Montesquieu’s idea that liberty cannot exist where legislative, executive, and judicial powers are joined in the same hands. The key thought is:

  • If the same actors write the laws, execute them, and judge violations, they can use law as a tool of oppression with no neutral check.
  • Separating powers into distinct branches, each with its own sphere and interests, makes it harder for any one to turn government into an instrument of arbitrary rule.

In Federalist No. 78, Hamilton argues that liberty has “nothing to fear” from a judiciary that is truly independent and “distinct” from the legislature and executive, because it is the weakest branch and lacks the power of the purse or sword. The real danger to liberty, he says, comes if the judicial power of judging is joined with the power to make or execute the laws, since then those who decide cases will also control the rules and their enforcement.

How separation is supposed to protect liberty

Hamilton’s logic relies on structure and self‑interest:

  • Each branch has its own constitutional powers and incentives, so it will resist encroachment by the others and thus indirectly protect the people’s freedom.
  • Formal separation, combined with checks and balances (like vetoes, appointments, and judicial review), forces cooperation and negotiation instead of unilateral rule.

Hamilton also assumes that an independent judiciary can serve as a guardian of the Constitution by voiding laws that violate higher law, which adds another barrier between government power and individual rights. This web of mutual checks is meant to slow down abuses, expose them to public scrutiny, and give time for political correction through elections.

Why this might not work

Even Hamilton’s own framework leaves room for failure, and later critics highlight several vulnerabilities:

  • Informal power can override formal separation : A dominant party, powerful executive, or legislative majority can coordinate across branches, so that “separate” institutions act as one political team instead of genuine rivals.
  • Dependence and capture : If judges or executive officials owe their positions, careers, or future prospects to political actors in the other branches, independence weakens and decisions may track partisan interests rather than constitutional limits.

Additionally, separation of powers can break down when:

  • One branch is too weak or passive to resist encroachment, allowing another to accumulate effective control (for example, when legislatures delegate vast power to the executive bureaucracy).
  • Public polarization leads citizens to tolerate or even applaud power grabs by “their side,” eroding the cultural norms that make formal checks meaningful.

Structural limits and modern concerns

Modern scholars point out that separation of powers does not automatically protect liberty; it depends on political culture, parties, and public engagement. If all three branches share the same ideological project or partisan loyalty, they may coordinate to expand government power rather than restrain one another.

Hamilton also underestimated how much power could be exercised through regulation, emergencies, and national security, where executives often gain broad discretion. In such contexts, the formal separation exists on paper, but the practical reality is that one branch can steer or sideline the others, weakening the safeguard Hamilton hoped would secure liberty.

TL;DR: Hamilton thinks liberty is protected when lawmaking, law‑enforcing, and law‑judging powers are kept in different hands so no one center of power can rule unchecked. It might fail when branches align politically, become dependent or passive, or when informal power and party politics erode the real, everyday separation that his argument assumes.

Information gathered from public forums or data available on the internet and portrayed here.