Humans are created in the image of the divine. Receiving and giving follow laws of nature and destiny. Giving a part of our wealth when we are able to do so is a natural law of maintaining balance in the universe. One of the main factors is simply the increased access to information. Until recently we were fairly isolated.
People have access to enormous amounts of information.
The world is moving very, very rapidly. There is a part of our being, that we will call the soul, that needs to be nurtured in something other than TV, fast-moving entertainment, business, and money. The soul wants to be touched in some other way, for example through nature, poetry, or through subtler, quieter, more direct kinds of connections with the Spirit. This is what mysticism is all about. And we start feeling a sense of purpose in life, we feel we belong, and we feel connected through our mystical understandings.