You can be any major at all: Theater, nursing, engineering, fine arts, Italian language or Portuguese, psychology and chemistry–there are branches of law pertaining to nearly any discipline–and judges are needed for these specialties. People outside of law think that law is all about fighting in criminal court or running for office and writing legislation, because that’s what’s portrayed in popular culture. One way to understand the various disciplines is to go to the website of your favorite law school and click on their link for “programs” or “centers”. Those links will take you to their special programs and their specialized centers of learning. But there are many other disciplines not listed there. These are just that school’s Centers and Programs.
For more info about what lawyers specialize in, click on faculty listing. YOu can see what that faculty member is interested in and what she or he researches and teaches (which might be two different things).
Here is NYU’s page for centers and institutes – http://www.law.nyu.edu/centers
Here is Harvard’s page – http://hls.harvard.edu/faculty-research/research-programs-and-centers/
Here is UVA’s page – http://www.law.virginia.edu/html/academics/academics.htm
Here is UMich’s page – https://www.law.umich.edu/centersandprograms/Pages/default.aspx
Here is Columbia’s page – http://web.law.columbia.edu/programs
Here is U of Chicago’s page – http://www.law.uchicago.edu/projects-initiatives