Seminal film on ecology and finite resources, often cited. The title is from a 1968 essay by ecologist Garrett Hardin: According to the concept, should many people enjoy unfettered access to a finite, valuable resource such as a pasture, they will tend to overuse it and may end up destroying its value altogether. Even if some users exercised voluntary restraint, the other users would merely supplant them, the predictable result a tragedy for all.

At the time this was made (1973), it had a profound influence on green issues. 

Shipping is a 12x12 box, with original round plastic case protecting the reel. Research indicates that this is a rarity, with no copies available and the video only accessible on a pay-per-view basis.