Final answer:
Stephanie Coontz has exposed the myth of the harmonious family, with divorce and domestic violence being two significant problems that families faced, challenging the notion of past familial tranquility.
Step-by-step explanation:
Stephanie Coontz has investigated the myth of the harmonious family that supposedly existed in the past and found it wanting. Two prominent examples of problems that contradicted this myth during the time are divorce and domestic violence.
Despite a decrease in divorce rates over the last twenty-five years, the negative effects of divorce, particularly on children, have continued to be a significant issue. This has contributed to a change in the typical structure of families and challenges relating to marital stability.
Another profound challenge families have faced is the prevalence of domestic violence and abuse, which impacts millions of children annually. This includes violence between spouses, between parents and children, and among other family members, creating a strain on the health and stability of families.