Ancient earthworks in Kazhakistan

“The idea that foragers could amass the numbers of people necessary to undertake large-scale projects — like creating the Kazakhstan geoglyphs — has caused archaeologists to deeply rethink the nature and timing of sophisticated large-scale human organization as one that predates settled and civilized societies,” Dr. Clarkson wrote in an email. From NASA adds to evidence of ancient mysterious earthworks
Similar evidence from Gobekli Tepe too. With all these findings it seems that big scale oranizations, heierarchy etc came with agriculture seems doubtful.