Social bond is the key for infant development and wellbeing

The family bond experienced in early life forms the foundation of the personality and social behaviors in the future.

<Effects of severe social isolation>

Extreme social isolation is lethal for primate neonates, even with appropriate nutrition and hygienic condition.  Survivors may suffer from the long-term effects on mental health and social behaviors.

<Bowlby's "Attachment theory">

"Mother love in infancy and childhood is as important for mental health as are vitamins and proteins for physical health."

And at the same time,

"The infant and young child should experience a warm, intimate, and continuous relationship with his mother in which both find satisfaction and enjoyment."

"If a community values its children, it must cherish their parents."

Transport Response, infant calming during carrying, is an infant cooperation 

The Transport Response = infant calming response by maternal carrying