What do you think is the most important sign of early civilization?

kudriavtseva

yesenia.ortiz

tseibert

aorantes

3ho.jason

ms.shellie.harris

marcela.cerda

xochitl.zuniga

wolfej

doconnor

luke.kearns

danielle.rochester

brooke.johnson

JHieber

kjenkins

rosie.fluegel

sagadatzeynep

lois.moon

jjohnson