You could have a college major in any possible area of academic inquiry, which means the number of potential college majors is unlimited. Each school can only

You could have a college major in any possible area of academic inquiry, which means the number of potential college majors is unlimited. Each school can only have so many faculty and they have to balance various factors when deciding who to hire. More resources dedicated to offering new majors might mean less resources going to popular majors that are overenrolled.