“Overdrafts on aquifers are one reason some of our geologist colleagues are convinced that water shortages will bring the human population explosion to a halt. There are substitutes for oil; there is no substitute for fresh water.”

Source: Down and out in Paris and London (1933), Ch. 7

"Holla If Ya Hear Me" http://www.azlyrics.com/lyrics/2pac/hollaifyahearme.html (1993).
1990s

Notwithstanding My Weakness, 1981, Deseret Book Co. (Salt Lake City, Utah), pg. 7.

Source: Henry L. Trewhitt (1971) McNamara, p. 119
Context: You can never substitute emotion for reason. I still would allow a place for intuition in this process, but not emotion. They say I am a power gabber. But knowledge is power, and I am giving them knowledge, so they will have more power. Can't they see that?

http://www.paulglover.org/8702.html (“Where Does Ithaca’s Food Come From?”), The Grapevine, cover story 1987-02-20

Report of the Independent Expert on the promotion of a democratic and equitable international order exploring the adverse impacts of military expenditures on the realization of a democratic and equitable international order http://www.ohchr.org/EN/Issues/IntOrder/Pages/Reports.aspx.
2015, Report submitted to the UN Human Rights Council

Journals of Ayn Rand (1997)