Anyway here it is, as it was; written in 2005. I believe people change over time and past views may also change, but I've left this as it was, and I think it's a little simplistic, but still true.
What is the biggest human failing known to man. This single characteristic is the source of most of what goes wrong in the world. This failing is the one of 'self-betterment' and self preserval, the quality of selfishness.
So while both these two kinds of people exist you may wonder why then is there so much trouble in the world. The reason for this is simply that selfless people do not really seek to benefit themselves as this would be a selfish act in itself. To accumulate so much power would require the underhand tactics used by those previously described.