“Some people are not much more than herd animals, which rot together when the world becomes uncomfortable… I am not one of them. If I had a motto, it would probably be: The herd over there, I here”

1950s, What Desires Are Politically Important? (1950)

Liberalismus: auf deutsch Heerden-Verthierung ...
Skirmishes of an Untimely Man Sect. 38
Twilight of the Idols (1888)

“Bryan Adams on Animal Rights and Being Vegan”, interview with PETA, in Peta.org (7 January 2007) http://www.peta.org.uk/blog/bryan-adams-animal-rights-vegan/

Frequently misquoted as "Thinking is difficult, that's why most people judge" and close variants.
Flying Saucers: A Modern Myth of Things Seen in the Sky. (1959), C.G. Jung, R.F.C. Hull (translator) (Princeton Press, 1979, ISBN 9780691018225

(original Dutch, citaat van B.C. Koekkoek:) Ik geloof dat de algemeene, hier heerschende gelukkige gemoedsstemming der menschen [in Elberfeld, Germany] grotendeels door den natuur wordt veroorzaakt. Ik ten minste ben van gevoelen, dat in oorden, zooals deze de mensch natuurlijker is, dan in streken waar de natuur hem weinig of niets aanbiedt, om zijn hart eenige tijd van de huichelarij der wereld af te trekken, en een niet bedrieglijk genot te smaken.
Source: Herinneringen aan en Mededeelingen van…' (1841), p. 47

Vom Schmetterling zur Doppelaxt: Die Umwertung von Weiblichkeit in unserer Kultur (1990), p. 9, 11.
Vom Schmetterling zur Doppelaxt (1990)
Context: Humans belong to the category of herding animals, due to which intra-species aggression at a life-endangering level is obviated. In other words: If, for some reason or another, severe conflicts [... ] of the kind common since the last circa four-and-a-half millennia would have occured during the time of our hominisation, our ancestors would have completely eradicated each other and homo sapiens would have never set foot on earth. For a species that in its individuals was so weak when confronted with many predators preying after them required support from its kind in order to survive. We possess neither claws nor fangs nor the strength to successfully withstand the larger carnivores all alone, however it is as a group that we may survive together though never without sacrifice and courage. When our non-human ancestors began living in packs in order to stand together when facing hazards, they developed a behaviour that we may term 'social intelligence', which is the ability to co-operate with one's species in order to maintain the well-being of all. Modern homo sapiens still possesses this potential, however our culture has effectively damaged it.

[... ]

It must have been a peaceful world, for early settlements at large exhibited no fortifications regarding human attacks. For maybe one or two millennia [after the end of the last glacial epoch], humans obviously lived an untroubled life under these social conditions.

Kupfer, David, "Utah Phillips" http://progressive.org/mag/interview/utahphillips, The Progressive. September 2003. Web. August 6, 2013.