The opposite is an invention of a mind seeking to escape from the reality, the fear, and the sorrow of that which is. We invent detachment so we can escape from the truth of us being attached, we define and pursue the ideal of non-violence to keep us from discovering the truth of the violence within us, and we fascinate ourselves with the imaginative advent of immortality to keep us from needing to confront the fact of our limited existence. 
The opposite does not exist except in our minds. There is only that which is and there is an end to that which is. Attachment can end, as can violence. But to pursue detachment or non-violence is but a perpetuation of that which is - we get attached to the idea of being detached; we become violent in our pursuit of non-violence.
The attempt to escape is itself the bondage. A prisoner is not one who is confined but one who wishes to escape - from a prison, from a job, from a relationship, from life itself. Be free. Be now. Be with that which is.