He intends to achieve moral perfection through systematic effort.
The correct answer is - By having the same actor play both parts, the two characters become one and Hamlet's madness is confirmed.
When both Hamlet and the ghost are played by one character, we realize that the ghost never existed in the first place and that it was only a figment of Hamlet's imagination. When there is only one actor, we see that it is all in his head and that he is slowly going mad because of the death of his father.
It can be positive for some cultures as it allows self representation and information sharing on a whole new level, there are a number of negative impacts on culture, including the influence multinational corporations have on promoting a consumer culture, exploitation of workers and markets, this promotes a homogeneeous set of values and beielfs.Another reason is because they can drown out local influences.