The orthodox view, advocated by Roger Green and Peter Bellwood, and accepted by most specialists today, is the so-called "Triple-I model" (short for “intrusion, innovation, and integration"). This model posits that the Early Lapita culture arose as the result of a three-part process: “intrusion” of the Austronesian peoples of the islands of Southeast Asia (and their language, materials, and ideas) into Near Oceania; “innovation” by the Lapita people, once they reached in Melanesia, in the form of new technologies; and “integration” of the Lapita peoples into the pre-existing (non-Austronesian) populations.