Here is an excerpt from the book flow by Mihaly Csikszentmihalyi which has confused me a bit.
If the trend of traditional families keeping together is on the wane, the number of families that endure because their members enjoy each other may be increasing. Of course, because the external forces are still much more powerful than the internal ones, the net effect is likely to be further fragmentation of family life for some time to come.
The major concern I have with this complex sentence is that is the first line connected with the second line.
Is of course, because mentioned in the same context of the previous line?