Law schools expect no background in the law. Some colleges and universities have pre-law programs, which may be labeled majors, minors, or concentrations. Almost all colleges will have law-related courses. These courses are not necessary as background for success in law school. In fact, they may be contra-indicated.
Law schools look for particular skills.
Law schools expect that students will be able to read and understand extraordinarily large quantities of information. Law schools expect that students will be able to think critically and to reason through problems. Law schools expect that students will be able to communicate effectively, both orally and in writing. Students also must be able to research efficiently. Courses in the humanities and social sciences, particularly history, literature, and philosophy, often require a heavy reading and writing load as well as assignments requiring critical analysis.