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

kudriavtseva

yesenia.ortiz

aorantes

tseibert

3ho.jason

ms.shellie.harris

xochitl.zuniga

marcela.cerda

doconnor

wolfej

luke.kearns

kjenkins

JHieber

brooke.johnson

sagadatzeynep

rosie.fluegel

jjohnson

lois.moon

catherine.stines