Auxiliary Bishop Rob Mutsaerts of 's-Hertogenbosch has put the question most bluntly.

A Man’s Brain Changes (For the Better) When He Becomes a Father: Findings Revealed by the Nature Review

Certain ideological stances portray the father as merely an «accessory figure,» reducing his importance to social factors alone. Research concludes that «the transition to fatherhood marks one of the most transformative periods in human life, requiring fathers to adapt to a new, lifelong role.» What is the basis for this claim?