Thank you, everyone, for the information and commentaries. I didn't particularly want them to go away and keep on with their beliefs. In the past, I've brought up the Mexico/Malawi issue, but they just claim ignorance and I'm left with the feeling they're not going to run home and look it up.
I thought I would concentrate more on stuff they're familiar with. Since they're telling me how bad things are, I pointed out specific examples of the good that is happening around the world. That made them a bit uneasy admitting it. They had asked me what God thinks about the problems in the world. I responded by saying "not much," since he doesn't seem to be around and talk to us about it. Then they trot out the Bible to quote what he said. I said that, if they are His, those words are thousands of years old, and he hasn't said or done much lately.
So, I sought to engage them with what they feel the future will be by bringing up what their predictions of the future have been. I also want to hand them a resumé of what they explain now will happen next. It may seem I´m a glutton for punishment because, in the end, I may not change any minds. But for me, it´s an exercise in polemics and my ability to argue. I´m just not great with popping sources out of my head.
Thanks.