It's a question humanity has 1) asked itself, and one way to find out is to take a closer look at the behaviour of babies.… and use puppets. 2) speaking, are humans good or bad? It's a question that has 3) been asked throughout humanity. For thousands of years, philosophers have debated whether we have a 4) good nature that is corrupted by society, or a 5) bad nature that is kept in check by society. Psychology has uncovered some evidence which might give the old debate a twist.