What characteristics did the Olmec, Maya, Zapotec, and Aztec civilizations share?

The use of the calendar

Explanation:

They all used the calendar to predict eclipses, schedule religious ceremonies, and determine when to plant/harvest crops, and go off to war.

for starters, there is the structural trend of rising primary government expenditure as a share of gdp, which reached 36% in 2014, up from 22% in 1991. this increase reflected a political desire to address the poverty and inequality that had gone unaddressed during previous decades. to support the increase, brazil’s government increased taxes on consumption and promoted progress toward labor-market formalization. nonetheless, public investment, particularly in infrastructure, took a hit. in fact, with the exception of the 2005-2008 period, total investment as a share of gdp has remained below 20% since 1991.

an era of negotiation.

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