As used in 1776 in the United States Declaration of Independence, an unalienable right is a right that cannot be separated (alienated) from a person. It is a right that is a natural right of a human being, and which a government might suppress but cannot remove.
The right to life is a moral principle based on the belief that a human being has the right to live and, in particular, should not be killed by another human being. There are questions and issues surrounding when life begins and does an individual have the right to death.
Liberty consists of the social and political freedoms to which all community members are entitled. Liberty doesn’t mean total freedom. The exercise of liberty is subject to capability and limited by the rights of others. I’ve heard it said that my fist ends where your nose begins. I do not have the freedom to cause bodily or property damage against the desires of a person or owner.
The psychological and philosophical pursuit of happiness began in China, India and Greece nearly 2,500 years ago with Confucius, Buddha, Socrates, and Aristotle. More recently Abraham Maslow said “Human life will never be understood unless its highest aspirations are taken into account. Growth, self-actualization, the striving toward health, the quest for identity and autonomy, the yearning for excellence (and other ways of phrasing the striving “upward”) must by now be accepted beyond question as a widespread and perhaps universal human tendency … ” (Maslow, 1954, Motivation and Personality, pp.xii-xiii)
The intent of The Declaration of Independence was that individuals should have the liberty to live according to their desires for spiritual achievement, developing meaningful relationships, and acquiring property. The Virginia Declaration of Rights, written by George Mason and adopted unanimously by the Virginia Convention of Delegates on June 12, 1776 had similar expressions. “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.”