 The unitarian view became more popular in the United Kingdom, while the binary view held sway in the US, influenced by the work of Swiss psychiatrist Adolf Meyer and before him Sigmund Freud, the father of psychoanalysis.Freud had likened the state of melancholia to mourning in his 1917 paper "Mourning and Melancholia".He theorized that objective loss, such as the loss of a valued relationship through death or a romantic break-up, results in subjective loss as well; the depressed individual has identified with the object of affection through an unconscious, narcissistic process called the "libidinal cathexis" of the ego.