Twelve Angry Men Theme

The play Twelve Angry Men is about a murder trial, which a nineteen year old young man is accused of murdering his father, with a knife. This trial depends on the eighteen year old's life because if he does get convicted he will be sent to the electric chair, so it is up to the jury to decide if a young man lives or dies. Right before the jurors go and decide how the young mans life is going to turn out the judge said to them,

 "It's now your duty to sit down and try and separate the facts from the fancy."

The judge wanted to remind them how important it is that they make the right decision, because there is a young mans life at stake. There is many important themes in this play.
The main theme that stands out to me is that every vote counts. In the play it begins with every person thinking the young man is guilty but one. He then talks and persuades the other jurors to actually listen to the evidence and tried to persuade them that the eighteen year old is not guilty. 
In the play Juror number 3 stated,

 "Here's what I think. And I have no personal feelings about this. I just wanna talk about facts." 

This quote shows that juror number three is not with or against the nineteen year old because he does not know the nineteen year old but all he does know is the facts, and if they are going to decide about someones life they should look at the facts very carefully.
One by one the jurors that believed that he is guilty stared to change their mind when they actually looked at the evidence and talked about it.
Eventually they all decided that the young man would be not guilty.