Final answer:
The study of 916 pregnancies indicated that Bari children with two fathers had better survival rates to adulthood due to the consistent presence and investment from a male, contributing to a healthier upbringing and stronger well-being.
Step-by-step explanation:
In the study of 916 pregnancies concerning Bari children, the findings indicate that those with two fathers generally had better chances of survival to adulthood. This is attributed to the constant presence of one male throughout the offspring rearing process, which tends to increase the likelihood that children will both survive and be healthier. The investment of resources, care, and protection from more than one male can provide the additional support necessary for ensuring the child's well-being and development.
Furthermore, historical context such as the Roman incentive system rewards fathers when their children reach adulthood and produce their own children, signifying the societal value placed on offspring survivability for long-term stability and prosperity. Modern studies also correlate the advantages children have in well-being and maturity when they are raised with the presence and involvement of their parents, which can be a contributing factor to the success noticed in the Bari study.