“…The urban centre of Tell Brak has also produced evidence of administrative technology where symbols have been used for accounting. All of this pre-dated the earliest findings of the equivalents in south Mesopotamia (Mallowan 1947, D. Oates 1985:164, Jasim & Oates 1986, Ball et al1989, Oates & Oates 1997, Emberling et al 1998:1, Emberling & McDonald 2001:21-23, Frangipane 2001, Gibson et al 2002, Rothman 2002, Ur 2002:393-401, Akkermans & Schwartz 2004, Oates 2004a, 2004b). The finds contested earlier anticipations of irrigation agriculture as a prerequisite for hierarchical power (Wittfogel 1964(Wittfogel [1957:12) and its importance for the Hansen (1965Hansen ( [1954), J. , Akkermans (1988), Schwartz (1988Schwartz ( , 2001, Ball et al (1989:31-32, figs 19-21), Weiss (1991:688), Oates & Oates (1993:170-174), Lupton (1996), Rova (1996Rova ( , 2003aRova ( , 2003b, Stein et al (1996:213-220), Nissen (2001), Rothman (2001Rothman ( : 2002, table 1.1), Gibson et al (2002), Ur (2002Ur ( , 2010, Ball & Wilkinson (2003), Emberling & McDonald (2003:3-12), Mayo & Weiss (2003), Numoto (2003), …”