Zen expected to become familiar with the classics of the Zen canon". A review of the early historical documents and literature of early Zen masters clearly reveals that they were well versed in numerous Mahāyāna Buddhist sūtras, including Madhyamaka. Especially the Lotus Sutra played a large role in the development of East Asian Buddhism, including Zen. Nevertheless, Zen is often pictured as anti-intellectual. This picture of Zen emerged during the Song Dynasty (960–1297), when Chán became the dominant form of Buddhism in China, and gained great popularity among the educated and literary classes of Chinese society. The use of koans, which
Buddhism in the West this period (this is known as the "Zen Boom"). Influential literary figures include the American writers Jack Kerouac ("The Dharma Bums" and "The Scripture of the Golden Eternity") and Gary Snyder as well as the British writer Alan Watts ("The Way of Zen"). The steady influx of refugees from Tibet in the 1960s and from Vietnam, Laos, and Cambodia in the 1970s led to renewed interest in Buddhism, and the countercultural movements of the 1960s proved fertile ground for its Westward diffusion. Buddhism supposedly promised a more methodical path to happiness than Christianity and a way out of the perceived