**Footnote [34]:
**Referring to the diagram of the hypertext, this is the so-called "cause-and
effect" diagram which is to be drawn as the first step of systems dynamics
simulation study. Some of connecting lines may be designated with (-) sign
for negative feedback, and the others with (+) sign for positive feedback.
The former dampens the effect of system change and the latter accelerate
it. After these preliminary studies, a mathematical model of the systems
dynamics simulation can be constructed.

Therefore, the construction of this "cause-and-effect" diagram
is the most basic approach for understanding interwoven inter-relationship
of various socio-economic-environmental factors -- an officer of the U.S.
governmental agency once told me that its use among them was common. This
understanding with rational analysis and critical thinking, I believe, is
now the vital necessity for world peace keeping.