No specific major is required to apply to law school. Here is a list of majors of law school applicants:
[url=http://lsac.org/docs/default-source/data-(lsac-resources)-docs/2014-15_applicants-major.pdf]http://lsac.org/docs/default-source/data-(lsac-resources)-docs/2014-15_applicants-major.pdf[/url]
Seems like your interests are in the social sciences, such as economics, sociology, and political science. Ethnic and cultural studies, and languages used by immigrants and refugees, may also be useful to you. That would be in addition to any courses which help your reading, writing, and logical thinking skills.
Some more information about undergraduate preparation for law school:
http://lawschoolnumbers.com/application-prep/ugraduate
You can see admit/reject plots of law schools here:
http://schools.lawschoolnumbers.com/
You can see employment rates for law schools here:
http://www.lstscorereports.com/schools/