The king or queen was no longer in charge of everything and more power was given to people and the so called 'slaves'
The Zapotec called themselves the "cloud people" :)
This is duties/obligations of responsible citizens
One factor was barbed wire. As farmers and ranchers wisened up, they used the wire to fence in their cattle, destroying the use of cowboys, and taking away one aspect of the "wide open west". Herds of cattle took over the plains and destroyed the grass. In 1883 the big drought struck and water streams dried up and prairie fires grazed. Also the barbed wire and the natural disasters.
C. it was able to use military bases in allied territories i think