List one advantage and disadvantage of the family unit in Jonas's community as compared to the family we know in our society.

In the community, there is no love.  The most significant
disadvantage of the family unit is that people do not experience either romantic or
familial love.  There are no spouses in the sense that we know them.  People do not fall
in love and marry.  A man or a woman decides to raise children, as a duty more than
anything, and applies for a spouse so that a suitable child-rearing partner can be
found.  The family exists only to raise the two children, a boy and a girl.  After the
man and woman decide they are ready they apply for a child, and a boy or girl is given
to them to raise.   After the youngest child grows up, the family unit disbands and the
adults go to live with the other childless adults.   The adults do not love each
other.

As the man and woman do not love each other, they
also do not love their children.  When Jonas asks his parents if they love him, he is
scolded for using imprecise language.  His parents tell him they are proud of him and
enjoy him, but of course they do not love him.  There is no love in the community,
including familial love.

The advantage of this arrangement
is that there are no broken families.  There is no divorce, and no unwanted children. 
Everything is carefully arranged to ensure that the adults are compatible, and capable
of providing a supportive environment for the children while they are with them.  Since
there is no love, there is also none of the pain associated with losing
it.