Parents and Children

 Generally speaking, the more mobile a family is, the less the siblings maintain a close relationship throughout their lifetimes.  This is also true, for the most part, if there is eight or more years difference in age.

However, the biggest determining factor that keeps families together or pushes them apart is the parents influence on the children.

That is to say if the parents treat the children with respect then for the most part the children will treat each other with respect long after the parents are deceased.

It is not just if the parents treat their children with respect, it is also how the parents raised their children.  For instance, if the parents were very strict with lots of rules and procedures, then not only will the children treat their children that way, but they will treat their siblings that way as well, ruining their future relationships.

The way parents treat their children is not related to education or financial resources or geographical location; however, cultures do influence parental oversights in the sense that Muslim children are more disciplined than non Muslim children...  this also applies to Christian children as well but not in the same way as the two societies are different.

In the USA, Christian parents who live in the north treat their children different than Christian parents that live in the south.

In many cases, but not all, the poorer the family unit, the closer the parents are to the children and the closer the children are to each other.