“These trends have given rise to a despairing attitude among those who see the political implications of demographic trends. The best and brightest families-those who will never be on welfare, who are owners and bequestors of capital, who have the willingness to be risk takers and who serve as the political backbone of the ‘free society have been outbred by people who exhibit fewer of these traits. Making matters worse, immigration law has been biased in favor of the latter, not the former, group.”

The Aggressive Will. p. 167.
Men Against Fire: The Problem of Battle Command (1947)

Source: Take Today: The Executive as Dropout

Source: Democracy for the Few (2010 [1974]), sixth edition, Chapter 12, p. 203

Cited as from an address in Addis Ababa (1963) in Simpson's Contemporary Quotations (1988) http://www.bartleby.com/63/73/1173.html edited by James B. Simpson ISBN 0395430852

For My Legionaries: The Iron Guard (1936), Jewish Problem

Alleged source is unkown. There are very few references to this quote in the internet, but early quotes can be found on twitter Tweet from 2010 https://twitter.com/karow55/status/24586690041. Brazillian writer Rodrigo Constantino cited it in the book "Prisioneiros da liberdade‎", page 157, without giving any further references. It may very well be a misquote from Plato's Republic Book 1, 347-C: "Good men are unwilling to rule, either for money's sake or for honour.... So they must be forced to consent under threat of penalty.... The heaviest penalty for declining to rule is to be ruled by someone inferior to yourself."
Disputed

This is not a quote by Kerouac. It's a quote by CBS broadcaster Charles Kuralt who used to present a TV news segment called 'On the Road' (which is probably how the confusion arose). This particular statement by Kuralt was made in May 1996 to students of Skidmore College, Saratoga Springs, New York: http://news.google.com/newspapers?nid=1298&dat=19960527&id=yf8yAAAAIBAJ&sjid=yQcGAAAAIBAJ&pg=3106,5606314
Misattributed

1960 Letter from Reagan to Richard Nixon, As quoted in The New York Times (27 October 1984) http://www.nytimes.com/1984/10/27/us/on-the-record-text-of-1960-reagan-letter.html
1960s