Watch "Fareed Zakaria GPS," Sundays at 10 a.m. and 1 p.m. ET on CNN
On GPS this Sunday: Amid an intensification of violence in Iraq, Fareed looks at what went wrong. Is it mostly Washington's fault, or does it have more to do with the region's history? A panel including Council on Foreign Relations President Richard Haass, Columbia University Prof. Rashid Khalidi, former Deputy National Security Adviser for Iraq and Afghanistan Meghan O'Sullivan and CNN security analyst Peter Bergen discuss what could have been done differently.
Then, in What in the World, there’s more from GPS’s list of five easy ways to ruin an economy – this time looking at Argentina.
Also, David Agus, one of the world's leading cancer specialists, explains why the best way to tackle cancer, heart disease, diabetes and many other diseases that plague the modern world, is prevention.
Finally, we take a look at a fascinating new study, which asked respondents in seven Muslim nations what style of dress they thought was "appropriate" for women to wear in public. You can find the full study here.