Extended family or a broken family

who is to look after one another in a family unit , or is there a separation of ones own offsprings/ or children in a human entity? somehow the basic family circle is missing from various family backgrounds in different curcumstances. There are instances of disconnecting a member from a person from a unit to be distanced thru experiences of worldly influences thru economic or self discovery ideas that cause this bonding.
Modern famililies are affected by employment and several social support inside a basic family unit, such that there could be limited support outside this core unit to be self sufficient . This causes the family tier to branch out and to look for assistance outside. The care factor could be a dispairing factor for such a scenario. The introduction of a new kid...born