- Current lifestyles and consumption patterns of the affluent middle class - involving high meat intake, the use of fossil fuels, electrical appliances, home and work-place air-conditioning, and suburban housing - are not sustainable.
- Maurice Strong, opening speech at the 1992 Rio Earth Summit[specific citation needed] But this quotation is not in the version posted on Mr. Strong's site. http://www.mauricestrong.net/index.php/opening-statement6
- If we don't change, our species will not survive... Frankly, we may get to the point where the only way of saving the world will be for industrial civilization to collapse.
- Maurice Strong, September 1, 1997 edition of National Review magazine
- What if a small group of world leaders were to conclude that the principal risk to the Earth comes from the actions of the rich countries? And if the world is to survive, those rich countries would have to sign an agreement reducing their impact on the environment. Will they do it? The group's conclusion is 'no'. The rich countries won't do it. They won't change. So, in order to save the planet, the group decides: Isn't the only hope for the planet that the industrialized civilizations collapse? Isn't it our responsibility to bring that about?
- Maurice Strong, Interview 1992, concerning the plot of a book he would like to write
- It is simply not feasible for sovereignty to be exercised unilaterally by individual nation-states, however powerful. It is a principle which will yield only slowly and reluctantly to the imperatives of global environmental cooperation.
- Maurice Strong, 1992 essay entitled Stockholm to Rio: A Journey Down a Generation[specific citation needed]
- "Our concepts of ballot-box democracy may need to be modified to produce strong governments capable of making difficult decisions." 
- Gibson, Donald. Environmentalism: ideology and power. pg. 95
- "Facing Down Armageddon: Environment at a Crossroads," essay by Maurice Strong in World Policy Journal, Summer, 2009 "Successful management of today's traumatic processes of change will not be easy to achieve. Our concepts of ballot-box democracy may need to be modified to produce strong governments capable of making difficult decisions, particularly in terms of safeguarding the global environment that this transition will require and whose results are often not immediately apparent."