When the brain is damaged, personality can dramatically change. People can suddenly have difficulty with moral decisions. An honest man may become a crook and a liar. Monogamous people may become sex-addicted and feel no regret after brain injury. Some may experience social confusion and not understand innuendo, rudeness, and lose the ability to read people's expressions.
Some people suffer from amnesia after brain trauma because memories are stored in the brain! We can even stimulate certain areas of the brain with electrical current and they may have vivid hallucinations. When brain activity stops, you are gone.
There is no evidence that once you die, a ghost or spirit leaves your body. Who would this entity be and how could it think when your personality and organ you think with remains in the brain and body?
Some peoples may argue with near death experiences, but the hallucinations produced in this time are neurons misfiring, oxygen deficiency, and mental and physical stress. Near death experiences can be induced by use of anesthetics like ketamine; it is not your soul going to heaven or hell.
There is currently no scientific evidence that hints toward consciousness beyond brain function. If there was, it would become mainstream science immedietly.
You are your brain! With all of this evidence, how can the majority of the people on this planet believe that there is a soul?
