This collaborative article examines the significant changes to New Zealand family law during the last 50 years. The article canvasses three areas that have seen substantial changes during this time - what constitutes a legal family; changes in the exercise of judicial discretion in family law cases involving children; and the evolution of the financial and property consequences of family breakdown. The article initially focuses on the law's reaction to the changing New 'Zealand family and the important milestones in this legal evolution. This is accompanied by a detailed, historic analysis of the difficulties in deciding what is "best" for children involved in family law disputes and the degree of judicial discretion that should be exercise...