Since Dr. Snodgrass is an interactionist, he likely believes that personality is determined more by situations than by traits.
Interactionism determines social progress (cooperation, identity formation, conflict) from the interaction of humans. This is the research regarding how society is shaped by individuals thru meaning that stems in interactions.
When Vietnamese Communists attempted to take over South Vietnam, the Vietnam War started.
Major threats to pioneer life and limb came from accidents, exhaustion, and disease. Crossing rivers were probably the most dangerous thing pioneers did. Swollen rivers could tip over and drown both people and oxen. Such accidents could cause the loss of life and most or all of valuable supplies.