On why father’s are important, from here:
It is impossible to over-estimate the importance of dad. For example, girls who have good relationships with their fathers are less likely to engage in risky behaviors and tend to do better in math. Boys who have actively involved fathers tend to have fewer behavioral problems, have better grades and perform better on achievement tests.
A review of more than 500 studies from around the world found that acceptance or rejection from a parent in childhood is one of the greatest influences on personality development. Rejection by either parent is a deep wound, and rejection or abandonment by the father can be particularly damaging.
The researchers suggest that, despite the social changes in gender roles, a father is still perceived to be the more powerful parent or the parent with the higher prestige, which makes rejection by him so profoundly hurtful.
Another study looked at an aspect of parenting that is usually ignored, the infant-father relationship. A fascinating English study assessed father-infant interactions when the babies were 3 months old, and compared them to the babies’ behavior at 12 months.
They found the children whose fathers were more engaged had better outcomes, and later on had fewer behavioral problems. Even the tiniest tots benefit from their daddies’ attention.