I think that is not true. I came to realize that most difficult social and environmental problems occur because of a set of causes acting in combination. Most o

I think that is not true. I came to realize that most difficult social and environmental problems occur because of a set of causes acting in combination. Most of the time, when a problem has a single cause it is possible to fix it easily. However, with many important problems it is so hard to find a solution exactly because so many of these causes have to be addressed at the same time.