On the surface, silence was simple: we didn't speak unless it was necessary. But what was the point of silence? The point was, we learned, not mere silence, not silence to preserve some sort of order, but something much greater. In silence the idea was to recollect ourselves, to place ourselves more squarely in the presence of God than we would if people were talking to us all the time. We could pray, we could meditate, we could contemplate.
The need is for the connection to nature within ourselves; only then can we understand how to act toward nature outside ourselves. Along with the obvious crimes our culture is committing against the natural world, we would be wise to remember that the main crimes are the crimes against our inner nature. From these inner crimes all the outer evil arises. This is the teaching of wisdom.