The Seven-generation sustainability reference article from the English Wikipedia on 24-Apr-2004
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Seven-generation sustainability

Time you got around to sponsoring a child
Seven-generation sustainability is the tenet that all decisions should be made with consideration for the effect they will have on the next seven generations to follow us.

Development of this concept is attributed to the Iroquois Confederacy, though it has been adopted by modern groups, including the Greens as an important component of the Future Focus item in the Ten Key Values of the US Green Party.