The "Encyclopedia" databases are much about how problems, strategies, values, development concepts, and organizations are linked together. As a result, the possibility of focusing on feedback loops has proven to be an important feature of the "Encyclopedia", and a program has been carried out to identify ""vicious problem loops"". A vicious problem loop is a chain of problems, each aggravating the next, and with the last looping back to aggravate the first in the chain. Here is an example: Man-made disasters, Vulnerability of ecosystem niches, Natural environment degradation, Shortage of natural resources, Unbridled competition for scarce resources, Man-made disasters. Solutions that focus on only one problem in a chain may fail or even be harmful, because the cycle has the capacity to regenerate itself, and also because several cycles may interlock, forming tangled skeins of interlinked global problems. The loop detection program detected more than 50,000 loops (of up to 9 elements) in more than 12,000 problem profiles. It is thought that a similar work could be done about mutually facilitating or constraining strategy loops, so as to constitute a dynamic response to aggravating or reducing loops of problems through a circle of matching strategies.