What is the Source of Human Rights

From the Virginia Declaration of Rights (June 12, 1776):

Section 1. That all men are by nature equally free and independent and have certain inherent rights, of which, when they enter into a state of society, they cannot, by any compact, deprive or divest their posterity; namely, the enjoyment of life and liberty, with the means of acquiring and possessing property, and pursuing and obtaining happiness and safety. 

Section 2. That all power is vested in, and consequently derived from, the people; that magistrates are their trustees and servants and at all times amenable to them. 

Section 3. That government is, or ought to be, instituted for the common benefit, protection, and security of the people, nation, or community; of all the various modes and forms of government, that is best which is capable of producing the greatest degree of happiness and safety and is most effectually secured against the danger of maladministration. And that, when any government shall be found inadequate or contrary to these purposes, a majority of the community has an indubitable, inalienable, and indefeasible right to reform, alter, or abolish it, in such manner as shall be judged most conducive to the public weal.

From the Declaration of Independence (July 4, 1776):

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed

What is the definition of "unalienable":

"Unalienable: incapable of being alienated, that is, sold and transferred." Black's Law Dictionary, Sixth Edition, page 1523:

From the Bill of Rights (March 4, 1789):

THE Conventions of a number of the States, having at the time of their adopting the Constitution, expressed a desire, in order to prevent misconstruction or abuse of its powers, that further declaratory and restrictive clauses should be added: And as extending the ground of public confidence in the Government, will best ensure the beneficent ends of its institution.

From the French Declaration of the Rights of Man (August 26, 1789):

The representatives of the French people, organized as a National Assembly, believing that the ignorance, neglect, or contempt of the rights of man are the sole cause of public calamities and of the corruption of governments, have determined to set forth in a solemn declaration the natural, unalienable, and sacred rights of man, in order that this declaration, being constantly before all the members of the Social body, shall remind them continually of their rights and duties; in order that the acts of the legislative power, as well as those of the executive power, may be compared at any moment with the objects and purposes of all political institutions and may thus be more respected, and, lastly, in order that the grievances of the citizens, based hereafter upon simple and incontestable principles, shall tend to the maintenance of the constitution and redound to the happiness of all.

From Franklin D. Roosevelt's Address to Congress (January 6, 1941):

In the future days, which we seek to make secure, we look forward to a world founded upon four essential human freedoms. 

The first is freedom of speech and expression -- everywhere in the world. 

The second is freedom of every person to worship God in his own way -- everywhere in the world. 

The third is freedom from want -- which, translated into world terms, means economic understandings which will secure to every nation a healthy peacetime life for its inhabitants -- everywhere in the world. 

The fourth is freedom from fear -- which, translated into world terms, means a world-wide reduction of armaments to such a point and in such a thorough fashion that no nation will be in a position to commit an act of physical aggression against any neighbor-- anywhere in the world.

From  the Universal Declaration of Human Rights (December 10, 1948):

Whereas recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family is the foundation of freedom, justice and peace in the world, 

Whereas disregard and contempt for human rights have resulted in barbarous acts which have outraged the conscience of mankind, and the advent of a world in which human beings shall enjoy freedom of speech and belief and freedom from fear and want has been proclaimed as the highest aspiration of the common people, 

Whereas it is essential, if man is not to be compelled to have recourse, as a last resort, to rebellion against tyranny and oppression, that human rights should be protected by the rule of law, 

Whereas it is essential to promote the development of friendly relations between nations,
Whereas the peoples of the United Nations have in the Charter reaffirmed their faith in fundamental human rights, in the dignity and worth of the human person and in the equal rights of men and women and have determined to promote social progress and better standards of life in larger freedom, 

Whereas Member States have pledged themselves to achieve, in co-operation with the United Nations, the promotion of universal respect for and observance of human rights and fundamental freedoms, 

Whereas a common understanding of these rights and freedoms is of the greatest importance for the full realization of this pledge, 

Now, Therefore THE GENERAL ASSEMBLY proclaims THIS UNIVERSAL DECLARATION OF HUMAN RIGHTS as a common standard of achievement for all peoples and all nations, to the end that every individual and every organ of society, keeping this Declaration constantly in mind, shall strive by teaching and education to promote respect for these rights and freedoms and by progressive measures, national and international, to secure their universal and effective recognition and observance, both among the peoples of Member States themselves and among the peoples of territories under their jurisdiction.

 Definition of "inalienable":

incapable of being alienated, surrendered, or transferred

The Declaration of Independence considers rights as given by the "Creator". The Virginia Declaration of Rights and the French Declaration of the Rights of Man as "natural" and in the case of the French, "sacred".

The Bill of Rights simply indicates that the people who defined the Constitution sought to limit government by defining rights that it might not infringe upon.

The Universal Declaration of Human Rights fixes rights as a matter of international law (especially in the conventions implementing various aspect of the Declaration).

It would seem, however, that in all cases documents are used to specify which rights are to be protected or not infringed upon by government. It seems to me that we can enshrine in that portfolio a right to health care or, as FDR did,  a right to freedom from want.