It was between the small states and big states. The small states wanted each states to have the same number of representation in Congress the big states wanted representation based on population .
King Authur believed sir Pellinore was a great adversary and that they can work togethor to take back the Holy Lands
Postive effects could be that it brings people together, gives them a community for supporting each other, focuses their attention on God. It provides a moral framework, comfort for those in need, the promise of an afterlife... and so on.
Negative effects are that the different religions can be seen to inspire conflict in the world, some might say that they focus people too much on religious things rather than on day to day things (so you lose the plot basically!).