The Norte Chico chiefdoms were "...almost certainly theocratic, though not brutally so," according to Mann. Construction areas show possible evidence of feasting, which would have included music and likely alcohol, suggesting an elite able to both mobilize and reward the population. The degree of centralized authority is difficult to ascertain, but architectural construction patterns are indicative of an elite that, at least in certain places at certain times, wielded considerable power: while some of the monumental architecture was constructed incrementally, other buildings, such as the two main platform mounds at Caral, appear to have been constructed in one or two intense construction phases. As further evidence of centralized control, Haas points to remains of large stone warehouses found at Upaca, on the Pativilca, as emblematic of authorities able to control vital resources such as cotton. Economic authority would have rested on the control of cotton and edible plants and associated trade relationships, with power centered on the inland sites. Haas tentatively suggests that the scope of this economic power base may have extended widely: there are only two confirmed shore sites in the Norte Chico (Aspero and Bandurria) and possibly two more, but cotton fishing nets and domesticated plants have been found up and down the Peruvian coast. It is possible that the major inland centers of Norte Chico were at the center of a broad regional trade network centered on these resources.