[kang]

The difference between a byzantine agreement and a federated byzantine agreement used in SCP is that it reaches consensus based on quorum slices rather than the whole network consensus. This is just removing the graph edges from the bitcoin node network. The real problem then is optimum quorum slicing to guarantee many possible problems that might arise, such as partition-tolerance, non-survival of a bad node etc .

Maybe you have addressed these concerns, I'll read the paper to check. Can you please answer one question though, how are the coins originated in this system?

[swamp12]

Yes a node in the Stellar network doesn't need to know all the other nodes in the whole network and adding and removing nodes is a fluid and open process but yes there must be some transitive overlap in the quorum slices people choose. The details would be better explained in the paper.

All the coins(lumens) exist when the network starts up. The Stellar Foundation is distributing them in the following way: https://www.stellar.org/about/mandate/#Stellar_distribution