In March 1984, Professor Geoffrey Blainey, an Australian historian, made a speech criticizing what he saw as disproportionately high levels of Asian immigration to Australia. Blainey's remarks touched off a flood of debate and controversy about immigration and multiculturalism, known as the 'Blainey debate'. In 1984, he wrote a book outlining his ideas on immigration and multiculturalism titled "All for Australia". Blainey remained a persistent critic of multiculturalism throughout the 1980s, claiming multiculturalism was a "sham", "anti-British" and threatened to transform Australia into a "cluster of tribes".