Valene Smith’s 1977 landmark study identified seven types of tourists based on their impact on the host culture and their need for western amenities. 1. Explorer: Travels in very small numbers, seeks out-of-the-way places, and easily accepts local norms. 2. Elite: Experienced travelers who can afford to pay for custom, unusual trips but still expect high-quality service. 3. Off-Beat: Seeks to get away from the crowds and identifies with the "authentic" but usually returns to standard comforts for lodging. 4. Unusual: Occasionally takes "daring" trips to see "exotic" cultures but typically travels in organized groups for part of the trip. 5. Incipient Mass: A steady flow of people traveling to a destination where tourism is becoming a dominant industry. 6. Mass: The "standard" tourist who relies on a massive tourism infrastructure (hotels, diversions) and travels in large numbers. 7. Charter: Large groups that arrive en masse, demanding standardized "home-away-from-home" environments with little to no interest in the local culture.