Wow, Mojo! According to what we learned about you, your family, your style, your interests and your educated mother, this brother you mentioned looks like the "black sheep of the family". I wish it's a story from his younghood and that nowadays he's already not doing this, because it's embarrassing for all of the family; something like "One of us is a 'street-fighter'." or "One of us is playing the 'knockout game'!" (For those, who miss the news about this 'game' -- https://en.wikipedia.org/wiki/Knockout_game
Well, it's nothing new for me -- I remember around 1984-1985 we had some hooligans in our class. Once they went to a school for mentally challenged kids not to support them or to do something good for them -- they went there to fight with them. Just a senseless fight! But that time they were 9-10 years old. Many years later I met one of them and I saw he become a comparatively intelligent, polite and normal policeman.
Around 2003-2004 another person -- a 17-years old schoolboy who practiced with me JKD (Jeet Kune Do, the Bruce Lee's martial art) surprised me in this way: we walked nearby a medical university in our city, when I saw a group of foreign (Indian) university students walking in front of us. And I told that boy that I know one of these Indian university students and he also practice a martial art. My meaning was: "Look, he is our foreign Martial art colleague." and that 17-years old guy reacted: "Yeah! Let's go and beat him now!"
He was really excited of this 'idea' and I waste 2-3 minutes to stop him and to explain him that it's a good Indian student (because there were some bad Indians, but it's another topic), a kind of my friend, a person who never behaves aggressive, a 'cool guy', etc., and at last that boy understood that it's not good just to go to beat people, because he wants to fight!
Now, from time to time, we are teaching kindergarten level kids and it's a common situation every time in 1-2 classes to spot a boy (and sometimes -- a girl) to just hit/kick/grab/etc. others just 'for fun' and our normal reaction is to stop him/her and to teach how the senseless aggression is bad
. If you don't educate a person from his/her early age, later (especially if he/she is under aggressive influence from the medias, neighbors, friends, etc.) it's too late to change his/her mind. (I know it sounds very simple for you and probably very obvious and useful, because you learned these so basic education and psychological facts. I type it for the youngsters, who think that fights are 'normal'.) And here comes my serious advice
1. Fighting without reason is risky -- even you are 'the best', you can lose something valuable like an eye, ear... some people (like Bruce Lee) are dying of cerebral edema (if you take a look of the causes -- https://en.wikipedia.org/wiki/Cerebral_edema#Causes
-- you may see that it can result from brain trauma/, i.e. someone hit your head and later, some day you're dead (or you have serious health problems), because of that hit ago.
2. Fighting without reason is risky also, because many people don't only fight back -- they have weapons, they may shoot back! (Another case is when they collect many friends and/or relatives and they find you and beat you all together.)
3. Fighting without reason is risky for your future: if you are not lucky enough and you hurt somebody with a weaker body he/she may die and then you'll have to face police, court, jail... Then it's not easy to live well finding jobs in your area or abroad. For example I had to show many times abroad my conviction status certificate (it is an official document issued by a Bulgarian District court which contains information about the criminal record of an individual.http://www.wikiprocedure.com/index.php/Bulgaria_-_Obtain_a_Conviction_Status_Certificate
). And if you didn't know what's a criminal record
: "A criminal record or police record is a record of a person's criminal history, generally used by potential employers, lenders etc. to assess his or her trustworthiness."https://en.wikipedia.org/wiki/Criminal_record https://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_License
TAKE SOME TIME AND READ AT LEAST ABOUT THE "Traveling with a criminal history": https://en.wikivoyage.org/wiki/Traveling_with_a_criminal_history
In a word: think more responsibly about your present and about your future!
Well, because it was mentioned already about work/jobs, I can ask a simple question: If in the real US life jobs like lawyer and surgeon are one of the most profitable and most desired? (Because I watched many films, where lawyer or surgeon/doctor is a label for a successful man and very good husband.)