
A child who has been used to two parents and has become attached to them both finds a divorce between them destructive of his whole sense of security. Indeed, he is likely in these circumstances to develop phobias and other nervous disorders. When once a child has become attached to both his parents, they take a very grave responsibility if they separate.
Source: Bertrand Russell :Marriage and Morals, 1929
More info.: https://russell-j.com/beginner/MM14-070.HTM