The Park Service, like any other big organization, includes factions and factions. The Developers, the dominant faction, place their emphasis on the words “provide for the enjoyment.” The Preservers, a minority but also strong, emphasize the words “leave them unimpaired.” It is apparent, then, that we cannot decide the question of development versus preservation by a simple referral to holy writ or an attempt to guess the intention of the founding fathers; we must make up our own minds and decide for ourselves what the national parks should be and what purpose they should serve.