A physical force that creates damage. Human violence has its roots in hysteria born of inferiority, a self pity that desires to draw attention to itself as the only means of making others aware of their existence.
It is possible for those who lead a violent and wicked life to remain unrepentant in the spirit world for hundreds and sometimes thousands of years. Such an individual could influence another on earth to their detriment if there is an attraction between them. Greed and selfish desire provide the conditions for obsessions and influence to occur.