I don't think belief in god should be predicated on man's ability to govern himself or the dire state of the world. In other words, the problems in the world and or the world's seeming path to self destruction is not a good reason to believe in a god.
There is a logical fallacy called argument from consequences where a person refuses to accept a logical argument simply because they cannot stomach negative implications of the argument if it is true.
Truth does not owe you comfort and hope. Truth can be a bitch. More than 90% of all species that have ever lived are now extinct, and the majority of them went extinct before humans came into being! It is therefore not reasonable to think that the universe somehow owes the human species a successful future. Sure we all want humans to continue forever. But its not wise to let that desire cloud our thinking. Arguing from emotion is not valid thinking.