Not speaking to a sibling

It is time to extend the olive branch. Not knowing the background of the dispute that has caused this or hearing both sides of the story all I can recommend is that you apologize first.

You must both learn to forgive and forget the past. Family is to important to not speak to each other any longer.

Call your brother, invite out for a cup of coffee and tell him how much you miss him and that you are sorry about the past. Give him a hug or a handshake and apologize again.

Whatever you do, do not become accusing or start blaming him for the past. Be the better person and accept responsibility.

Good luck and best wishes. 

Life is too short and unpredictable not to make amends with your family. No matter what the reasons are behind the two of you not speaking, I think you should put the past behind you and contact your brother to make amends. If you and he still have disagreements/fights, learn to agree to disagree and leave the baggage at the door. It's not worth regretting later when the person is not around and you cannot see or speak to him/her.