Final answer:
The Declaration of Independence's ideals of liberty, equality, and justice are still practiced today through a government structured by the U.S. Constitution. These principles remain at the core of American democracy, exemplified by the separation of church and state and the safeguarding of individual freedoms.
Step-by-step explanation:
The systems of belief outlined in the Declaration of Independence that are still practiced completely within our government and society today are rooted in the Enlightenment ideals of liberty, equality, and justice. These form the cornerstone of American democracy and the functioning of the political system. The U.S. Constitution and the Declaration of Independence serve as enduring frameworks that balance these principles, manifested in practices such as the separation of church and state, the provision of freedoms such as speech and religion, and the pursuit of a just government that supports citizens' liberty and equality. In accordance with these Enlightenment values, the Founding Fathers like Thomas Jefferson and James Madison created a government aimed at ensuring these rights. This government structure has remain largely intact for over 200 years, showcasing the robustness of its design. Even in modern times, while there may be challenges in the full realization of these ideals, the essence of these foundational documents continues to guide governmental operations and societal norms. It is important to note that while some involvement and entanglement between governmental functions and religious practices are inevitable, efforts are made to maintain a clear division, as established by the Constitution. The principle of religious freedom remains a hallmark of the American value system, even as it is continually tested and refined in the social and legal arenas.