Britannica-com on laissez-faire:
http://www.britannica.com/search?ct=eb&query=%6C%61%69%73%73%65%7A%2D%66%61%69%72%65
"laissez-faire
Encyclopædia Britannica Article
Page 1 of 1
(French: "allow to do"), policy based on a minimum of governmental interference in the economic affairs of individuals and society. The origin of the term is uncertain, but it is usually associated with the economists known as Physiocrats, who flourished in France from about 1756 to 1778. The policy of laissez-faire received strong support in classical economics as it developed
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http://www.britannica.com/eb/article?tocId=9046862&query=laissez-faire&ct=eb
Here is Laissez-faire on Wikipedia:
http://en.wikipedia.org/wiki/Laissez-faire
Entering the term into Google will net you a lot more.
Social Darwinism from Britannica.com:
social Darwinism
Encyclopædia Britannica Article
Page 1 of 1
the theory that persons, groups, and races are subject to the same laws of natural selection as Charles Darwin had perceived in plants and animals in nature. According to the theory, which was popular in the late 19th and early 20th centuries, the weak were diminished and their cultures delimited, while the strong grew in power and in cultural influence over the weak.
http://www.britannica.com/eb/article?tocId=9068442&query=Social%20Darwinism&ct=eb
Social Darwinism from Wikipedia:
http://en.wikipedia.org/wiki/Social_Darwinism
and the google page on Social Darwinism:
http://www.google.com/search?sourceid=Able2Know.com&q=%53%6F%63%69%61%6C%20%44%61%72%77%69%6E%69%73%6D
And here is the Google page for Gospel of Wealth!
http://www.google.com/search?sourceid=Able2Know.com&q=%47%6F%73%70%65%6C%20%6F%66%20%57%65%61%6C%74%68
Too much for me to precis for you!