I don't believe that society should be blamed for Bigger's take on the world or his actions. Even though Bigger was raised in a time in our world where blacks don't receive the same treatment as whites, society doesn't ultimately affect your decisions that you make. A society is just a figure that changes in everyone's mind, and not everyone will have the same take on what a socitey should be. While Bigger has grown up to treat whites differently and to some extent be afraid of them, it still doesn't allow the action to kill an innocent person in fear. Mary's death was a mistake, on her and Bigger's part, but that doesn't mean that Bigger's take on whites made him kill, he was just fearful of losing his job. When it comes down to the aspect of fear for Bigger, i believe if Mary was black or white, and his future was at risk, he would commit the murder; whether she was white or not just to save his own self.