The success or failure of a country, company or organization lies in its leaders.
My country has a smart but inept president who is lazy and is out of touch with reality. He listens to people he thought of as friends. These people, in turn, take advantage of that. Thus the rampant issues on corruption and the failure to do what is right for the people.
An organization i know of used to have good and respectable leaders. During that time, it thrived, had a lot of members and a lot of money in the bank to fund projects. Then came a period where the good leaders left because of conflicts of interest and power tripping. The millions were slowly drained away by corruption and greed. The leadership became a group decent people wouldn't want to associate themselves with. A whole bunch of decent people left. One is decent but suddenly surrounded and led astray by corrupt and greedy people. One new "leader" if you can call him as such, is so greedy that he extorts people, worse he extorts kids. A drunk, a womanizer and an extortionist in one tiny package. Only one of those in a group could destroy anything.
There is another organization, one with lofty goals. This one is led by people who keep the goals in mind and keep it lofty. They embody people who you would like to emulate. Growth of this organization is fast and steady.
In the end, it is sometimes just luck that crappy people doesn't infiltrate your organization. Or if they do, strength of will and fortitude is needed to keep them at bay.