Lasswell was particularly influenced by the development of aerial warfare, especially as employed during the Second Sino-Japanese War, which he believed would lead to a "socialization of danger" throughout. His writings preceded and anticipated criminal fire-bombing campaigns in the era of the Vietnam War, including the use of Agent Orange, and beyond, as well as firebombings of Dresden, Tokyo, London, Hamburg and use of atomic bombs on Hiroshima and Nagasaki during World War II.