I'm sorry, I never did differentiate between different types of environmental factors. Here you go - this completes the paragraph on that.
Drugs, chemicals and injuries could, depending on when they occurred, cause temporary or permanent changes, I think. Abuse can lead to a variety of mental illnesses, with psychopathy being just one possible outcome. Bullying is a consequence of various factors, including abuse, being the victim of bullying at home or in the community, and may also, perhaps, learned from video games and TV, although I think that media plays a more "supplementary" role, by normalizing violent behavior. Bullying, thus, probably will not cause psychopathy but, if not appropriately addressed, can lead to depression, suicide, violent attacks including school shootings, and a life full of difficulties.