Actually, the world probably WOULD be a much better place if everyone who didn't "know God" (as the Christian fundies define God) were locked in a jail cell with nothing but a Bible for a month...but it really depends on what you mean by "better place."
See, you would be locking up about 3+ billion people with no food or water. After about 2 weeks, the population of the Earth would be reduced by almost 2/3 of it's current level. You would have pretty much removed the Chinese, the Japanese, the Indians, the Arabs, the Kurds, the Persians, the Northern Africans, etc. In fact, you would have depopulated most of Asia, Africa, and the Middle East.
All of a sudden there would be enough natural resources for all. Enough oil, enough water, enough food. Enought steel, enough energy, enough medicine, enough coal, enough papaer, enough land.
We could spread out! Get some elbow room without having the annoyance of having to make adjustments for other cultures. (God, didn't you just hate that?) No more need to worry about the fact that you can't schedule Marty Goldberg to work on Saturday. No more need to make sure the company picnic doesn't serve beef because Sanji is a Hindu. No more having to stop work for 5 minutes so Hakim can pray. Wouldn't the world be a fine place then?
Of course, the remaining majority Christian nations would quickly fall to fighting over who gets the Middle East and all that oil, wouldn't they? Remember, Christians like to fight each other every bit as much as they do other faiths. And all those dead bodies rotting away in their prison cells...no way you could clear them all away in time. Imagine the plages that would rage through the world. Imagine the rats, he vermin, the bacteria. Imagine the stench of 3 billion corpses...
Imagine the glabal chaos as the remaining nations scramble to occupy the now-abandoned territory. Imagine the inter-faith conflict as the Baptists and the Cathilics finally decide to have the whole thing out once and for all. Imagine the uproar when it's noticed that the Mormons, the Jehovah's Wittnesses, and the Scientologists are still here!
Imagine when that first angry, angst-ridden, rebellious teenager strolls into the abandoned library in Jakarta and finds a copy of the Koran. Or worse yet, Mein Kampf? (Oh, wait, Mein Kampf was written by a Christian author, it would still be in bookstores, wouldn't it?)
OK, sarcasm aside. I assume you mean that if everyone who doesn't "know God" were sequestered with only a Bible, then they would all miraculously become Christians over that 30 days since all they would be able to do is read the Bible, and you aparently think that reading the Bible will transform you into a Christian.
News flash: you don't convert people by pissing them off. Do you think locking them up for a month with nothing but a Bible might just piss them off a tad...?
And secondly, man, millions of people have read the Bible and not been converted. Many people have read the Bible and found it so ridiculous that they immediately discarded it as supperstition and myth. And the odds of that happening are pretty good when the Bible is simply read in a vacuum. Why do you think most Churchs strongly encourage members to attend organized "Bible studies," but you rarely see a church strongly encouraging it's members to "just go read the Bible?" It's because the church wants to make sure you "read the Bible" their way, that you interpret it their way, that any questions or confusion can be explained their way.
If the Bible was straightforward and clear in it's meanings...then we wouldn't have (at last count) more than 700 different Christian sects and denominations, would we?
