uhh.we were talking about salvatore not wright family. but anyway the game will not recognize wright family wiped out if u kill them all. i think you need to kill only key characters in game to change something. i think killing mr wright will be the same as you wiped out whole family. or no? anyway wright is the most difficult to kill without someone attacking you. i kill bishop and mardina by puting explosives in tables near them. and salvatore. well i just enjoy killing them.
btw is there some way to have child during game?

i know u can sleep with bishops wife and then on outro it says they had a son who died in 73 but i cant do anything with it.