Indeed, several authors consciously associated with each other and identified themselves as members of the English School from the first generation scholars of the 1950s to 1970s such as Herbert Butterfield, Martin Wight, Hedley Bull, Adam Watson, Michael Donelan, Roy J. Vincent; to the second generation scholars emerging with the 1990s onwards such as Barry Buzan, Tim Dunne, Peter Wilson, Hidemi Suganami, Nicholas Wheeler and Robert Jackson, to name but a few.