As Atomik is unable to cite any sources. based on her extensive research, to support her conclusions - I've done some trawling for something reasonably recent that looks at the work which has been done on the issue and seeks to find a balanced conclusion. I found this. Sorry, if it's a bit long - but it is incredibly sensible.
"Compared with children growing up in intact families, outcomes across a range of measures are poorer for children who experience family breakdown, and some of these persist into adulthood. For example, they are less likely to gain educational qualifications, and more
likely to leave home and become a parent at a younger age. The differences, however, are comparatively small, with many children not affected, and most children are not adversely affected in the long term. Some children benefit from parental separation, particularly children who have witnessed or been subject to violence and abuse, or living in households where there were high levels of parental conflict.
The review has shown that dimensions of family functioning and some socio-economic factors have a greater influence than family structure on child well-being. Financial hardship and poor or disrupted parenting have a negative impact on outcomes for children growing upin intact as well as separated families. It is therefore important to avoid the risk of
stigmatising certain family forms, such as single parent families, and to focus instead on the underlying mechanisms that contribute to poorer outcomes for children.
Recent research stresses that family breakdown should be understood as a process and nota single event. Evidence shows that a number of key factors contribute to, and/or are a consequence of, family breakdown. Among these, the most significant are financial hardship, poor maternal mental health, and protracted and unresolved conflict between parents. These factors interact in complex ways and, via a chain of events, have a cumulative effect. Typically, they lead to increased stress on the part of the custodial parent (usually mothers) which, in turn, increases the risk of negative outcomes in children.
However, positive maternal mental health and mothers’ access to adequate social and financial support serve to moderate the potentially negative impact of family breakdown on children. Good communication between parents, and positive child-parent relationships are crucial to children’s well-being. Parents who are able to contain their distress and to negotiate and facilitate acceptable arrangements post-separation also help their children to adjust to family breakdown.
The findings highlight the dynamic nature of change in contemporary family life. Divorce and parental separation are more common than they once were, and an initial experience of family breakdown often heralds further changes, including those in family structure. Increasingly, children and parents are required to develop the necessary coping skills to
adjust to repeated transitions in family form. In this context, it will be important for public policy to acknowledge the realities of family life and to adopt strategies that support parentsin the task of parenting and to enhance those factors"
From dera.ioe.ac.uk/11165/1/DCSF-RR113.pdf