“The following fact is a clear example of an important criterion with regard to man’s existence. Some few years back, a type of cactus was planted in Australia and, in no time, this plant covered a large tract of land to the extent that it disturbed the whole community and their farming activities. All efforts to prevent the spread of this plant proved fruitless, and Australia continued to be plagued by this plant.
Consequently, research conducted by some entomologist found that an insect, which cannot live without this cactus, reproduces rapidly, unhindered in the whole of Australia. In no time, this insect invaded and destroyed the cactus. Therefore, this is how this criterion and balance was changed.”1
- 1. Ibid., pg. 160.