I'm going to talk about Pierre clastres. He was born 1934 in France. He studied at University of Sorbonne, obtaining a licence in literature in 1957, and philosophy in the following year. He went into working anthropology after 1956 as student of Claude Levi Strauss. With Levi Strauss he learned structuralist theory (it was very important in the french academy) that was fundamental in his work.

He is best know for his contributions to the field of political anthropology. He was a anthropologist that wrotte the popular book "society against the state" in 1973.  this book is very important not only because it gives useful information about the sociopolitical constitution of the south american tribes, but also because it let us think about a new political model for our own society, different from the state.

His work were an attempt for leave the traditional state theory. The traditional state theory think that is imposible live in society out the state. By contrast, Clastres thought the tribes without state were societies and not only that, these tribes are against tje state. They have ways so there is hierarchy. The boss don't have political power. 
Today, their contributions are still valid in political theory.