A. Rand - Atlas shrugged

Setting
Galt's Gulch was inspired by Ouray, Colorado. It was here that Rand found inspiration to complete the novel, though she greatly expanded the small valley to include her many ideas for the story.
Exactly when Atlas Shrugged is meant to take place is kept deliberately vague. In section 152, the population of New York City is given as 7 million. The historical New York City reached 7 million people in the 1930s, which might place the novel sometime after that. There are many early 20th century technologies available, but the political situation is clearly different from actual history. One interpretation is that the novel takes place many years in the future, implying that since the world lapsed into its socialistic morass, a global stagnation has occurred in technological growth, population growth, and indeed growth of any kind; the wars, economic depressions, and other events of the 20th century would be a distant memory to all but scholars and academicians. This would be in line with Rand's ideas and commentary on other novels depicting utopian and dystopian societies. Furthermore, this is also in line with an excerpt from a 1964 interview with Playboy magazine in which Rand states "What we have today is not a capitalist society, but a mixed economy – that is, a mixture of freedom and controls, which, by the presently dominant trend, is moving toward dictatorship. The action in Atlas Shrugged takes place at a time when society has reached the stage of dictatorship. When and if this happens, that will be the time to go on strike, but not until then," thus implying that her novel takes place at some point in the future. The concept of societal stagnation in the wake of collectivist systems is central to the plot of another of Rand's works, Anthem.
In Atlas Shrugged, all countries outside the US have become, or become during the novel, "People's States". There are many examples of early 20th century technology in Atlas Shrugged, but no post-war advances such as nuclear weapons, helicopters, or computers. Jet planes are mentioned briefly as being a relatively new technology. Television is a novelty that has yet to assume any cultural significance, while radio broadcasts are prominent (in fact, television only makes its first appearance later on in the book, reflecting the fact that television appeared in the fifties, i.e., during the ten years it took to write the book). Although Rand does not use many of the technological innovations available while she was writing in the book, she introduces some advanced, fictional inventions (e.g., sonic-based weapons of mass destruction, torture devices, as well as power plants and a highly advanced strong steel alloy).
Most of the action in Atlas Shrugged occurs in the United States. However, there are important events around the world, such as in the People's States of Mexico, Chile, and Argentina, and piracy at sea.

Plot
The novel's plot is split into three parts. The first two parts, and to some extent the last, follow Dagny Taggart, a no-nonsense railroad executive, and her attempt to keep the company alive despite repeated encroachments by a society moving toward collectivism, altruism, and statism. Throughout the novel people repeat a platitude Dagny greatly resents: "Who is John Galt?" It is a reflection of their helplessness, as the saying means "Don't ask important questions, because we don't have answers."
The leaders and innovators of industry in the world seem to be disappearing, and the apparent decline of civilization is making it more and more difficult for her to sustain her life-long aspirations of running the trans-continental railroad, which has been in her family for several generations. She deals with other characters who often personify archetypes of what Rand considers the various schools of philosophy for living and working in the world (though they are in most cases often unconscious of it).
Some of these are: Hank Rearden, a self-made businessman of great integrity whose career is hindered by his feelings of obligation toward his wife. Francisco d'Anconia, Dagny's childhood friend, first love, and king of the copper industry, appears to have become a worthless playboy who is purposely destroying his business. James Taggart (Dagny's brother), president of the railroad, who seems peripherally aware of the troubles facing the company and the country in general, but who almost always makes the most short term and ultimately self-destructive choice.
As the novel progresses, the myths about the real John Galt, as well as Francisco d'Anconia's actions, increasingly become a reflection of the state of the culture and seem to make more and more sense. Hank and Dagny begin to experience the futility of their attempts to survive in a society that hates them and those like them for their greatness.
Dagny and Hank find the remnants of a motor that turns atmospheric static electricity into kinetic energy, an astounding feat; they also find evidence that the minds (the "Atlases") of the world are disappearing because of one particular "destroyer" taking them away. Dagny and Hank deal with the irrationalities and apparent contradictions of their atmosphere, and search for the creator of the motor as well as "the destroyer" who is draining the world of its prime movers, in an effort to secure their ability to live rational lives.
The question "Who is John Galt?" is also answered towards the closing of the novel — John Galt is a man disgusted that non-productive members of society use laws and guilt to leech from the value created by productive members of society, and furthermore even exalt the qualities of the leeches over the workers and inventors. He made a pledge that he would never live his life for the sake of another man, nor ask another man to live for him, and founded an enclave, separate from the rest of the country, where he and other productive members of society have fled.

Looters and moochers
Rand's heroes must continually fight against the "looters" and "moochers" of the society surrounding them.The looters are those who confiscate others' earnings "at the point of a gun" (figuratively speaking) —often because they are government officials, and thus their demands are backed by the threat of force. Some looters are following the policies of the government, such as the officials who confiscate one state's seed grain to feed the starving citizens of another state; others are exploiting those policies, such as the railroad regulator who illegally sells the railroad's supplies on the side. The common factor is that both use force to take property from the people who produced or earned it, and both are ultimately destructive.
The moochers are those who demand others' earnings because they claim to be needy and unable to earn themselves. Even as they beg for their help, however, they curse the people who make that help possible, because they hate the talented for having the talent they don't possess. Although the moochers seem benign at first glance, they are portrayed as more destructive than the looters—they destroy the productive through guilt and often motivate the legal looting performed by governments.
Looting and mooching are seen at all levels of the world Atlas Shrugged portrays, from the looting officials Dagny Taggart must work around and the mooching brother Hank Rearden struggles with, to the looting of whole industries by companies like Associated Steel and the mooching demands for foreign aid by the starving countries of Europe.