Iago / Othello
Although its title suggests that the tragedy belongs primarily to Othello, Iago plays an important role in the plot. He reflects the archetypal villain, and has the biggest share of the dialogue. In Othello, it is Iago who manipulates all other characters at will, controlling their movements and trapping them in an intricate net of lies. He achieves this by getting close to all characters and playing on their weaknesses while they refer to him as "honest" Iago, thus furthering his control over the characters. A. C. Bradley, and more recently Harold Bloom, have been major advocates of this interpretation. Other critics, most notably in the later twentieth century (after F. R. Leavis), have focused on Othello.
As the Protestant Reformation of England proclaimed the importance of pious, controlled behaviour in society, it was the tendency of the contemporary Englishman to displace society's "undesirable" qualities of barbarism, treachery, jealousy and libidinousness onto those who are considered 'other'. The assumed characteristics of black men, or 'the other', were both instigated and popularised by Renaissance dramas of the time; for example, the treachery of black men inherent to George Peele's 'The Battle of Alcazar' (1588).
Religious / Philosophical
Many critics have noted references to demonic possession throughout the play, especially in relation to Othello's seizure, a phenomenon often associated with possession in the popular consciousness of the day. Another scholar suggests that the epileptic fit relates to the mind-body problem and the existence of the soul.
There have been many differing views on the character of Othello over the years. A.C. Bradley calls Othello the "most romantic of all of Shakespeare's heroes" (by "hero" Bradley means protagonist) and "the greatest poet of them all". On the other hand, F.R. Leavis describes Othello as "egotistical". There are those who also take a less critical approach to the character of Othello such as William Hazlitt, who said: "the nature of the Moor is noble... but his blood is of the most inflammable kind".