The three plays that we’re going to analyze are the following: "The Dumb Waiter", "Betrayal", and "Ashes to Ashes", the three by the writer Harold Pinter.

These plays appeared in 1957, 1973 and 1996 thus we can see the evolution of the plays in a better way and what are the things that has in common and what are them differences.

The most significant change is the plot theme in his plays, and basically what the political theme refers to. The first of them, "The Dumb Waiter", is a play that is influenced by the end of the war, because of this, part of the theme was influenced in some way by this event. After that, in "Betrayal", the plot turns on the love triangle and unfaithfulness amongst three characters that are friends; in the period of the seventies, the age of liberation and licentiousness. Last place, there is "Ashes to Ashes", a play edited in 1996 and the plot is about the theme of bad treatment among the woman, something, unfortunately, that starts to appear in public at this period but appears the hidden face of it, she doesn’t denounce it.

Another aspect that we can analyze form the plays of Harold Pinter is that at the time his life and plays pass by, the writer changes the way how the characters speak and act, it’s a more human actitude, more near to the normality and the typical actuation of humans, regret it’s called "theater of the absurd".

One thing that the plays have in common is the way of talking among the characters. They use short statements and a lot of pauses within the dialogues.

Another aspect, it’s the way that he propose his plays, regret that they follow to be conversations within two or three characters about their lifes… in "Betrayal", he does an important change. This time, this play occurs to back from actuality and the lapse of time is of 9 years, and moreover, the situations changes from scenario although happen all of them in just one place, in this way, we can say that this play was the most ambicious of Harold Pinter.

The last aspect to comment, is that the situations, the dialogues and the ambience turns to be more "dark" than before. In this way, "Ashes to Ashes" or another of the last plays writted by him takes a darkest ambient for the theme of the play.

Like personal opinion, I can tell that the evolution of the plays of Harold Pinter is favorable and I like it because it focus in more human and common themes with a darkest ambient than before.