I suppose, but ultimately potential for aggression is genetic. We are animals too and people who produce more testerone and adrenalin are more likely to me aggressive than people who produce less.
That also depends on how you look at things--theres a definite correlation between agressive actions in hypogonadal men and their low testosterone levels. Fix the low test and they are't as "moody" or "aggressive".
Make of that what you want.
As far as the aggressive question, I think it depends on how you define aggression. All too often you see people with small "ankle biter" type dogs who would do their absolute best to try to chew your arm off, yet the humans are saying stuff like "isn't it cute", "its so cute, they won't hurt you" etc. Is that dog aggressive? In my mind hell yes. But becuase they are little, its poo pooed. At the same time take a pitbull that does the same thing and you'll have a "dangerous dog" that the local law enforcment will demand be euthanized.
My dogs play really, really rough. They'll roll, tumble, grab ahold of each other, growl, snarl and basically look like they are really going to do some harm to some people who don't know them. To me they are playing, they play like that every day. They all stop and sit when my wife or I give the stop command. They don't hurt each other or draw blood when they bite. Yet becuase they are large dogs, pitbulls and a dogo, many people would automatically call them "aggressive".
Does that make sense? Aggression is a relative term. All dogs can be aggressive. Dogs can also have actions that humans consider "aggressive" yet its not but the persons perception of the dog makes them think it is.