Jenn's suggestions here are excellent:
http://www.jiskha.com/display.cgi?id=1165545917.1165547272
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WHAT ARE SOME RECENT EFFECTS ORGANIZED RELIGION HAS HAD ON SOCIAL GRUPS IN CULTURAL AND GOVERNMENT TODAYS MOST RECENT EVENTS IN THE NEWS.
Here are several effects named for you:
http://www.jiskha.com/display.cgi?id=1165543964.1165545473
In addition to what's suggested here, you should research Iran's current government, which is inseparable from the religion of the country.
If you're going to choose one positive and one negative effect to concentrate on, you'll undoubtedly end up writing a comparison/contrast paper. Here are some links to help you with that.
http://leo.stcloudstate.edu/acadwrite/comparcontrast.html
http://grammar.ccc.commnet.edu/grammar/composition/comparison.htm
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YES THEY ARE