If the culture/religion still lives, how has Western culture changed it?
Which religion? In what location? Which part of "Western culture"??
Your question is far too broad. If you narrow the question, you'll probably be able to find good answers.
http://www.google.com/search?q=indigenous+religions&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA
http://www.google.com/search?q=western+effect+indigenous+religion&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA
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