Why do you think most people get divorced? Is it lack of independence or sexual incompatability or something else?
I think it is that people just don't match each other anymore. I think they may fall out of love or drift apart. 
I think sexual incompatability is the biggest reason personally, it leads to a lot of divorce directly or indirectly
Some probably have to do with that. I think a lot of people get restless and have a "grass is greener on the other side mentality." There is also a lack of commitment from a lot of people. 
i think most of the countries with arranged marriages have low divorce rates, why do you think that is?
I think that people are put together based on how compatible they are and that makes for better marriages. 
I suppose so, but you would think courtship and social activities would help, or being alone together
I think that people from those countries also have a different mindset about it. In America people are just groomed to think marriage can be easily ended and they live like that. 
That has to be true, a 50% divorce rate is insane to really think about
That is really really high. It is sad to think that when you see all the joy surrounding weddings.