In this work, author Richard Guy Wilkinson presents an examination of the biological relationships among certain Middle and Late Woodland populations from the Great Lakes area. He studied the skeletal material from many Midwest archaeological sites, including Juntunen, Younge, Bussinger, Steuben, and Norton Mounds (the largest Hopewellian complex in Michigan). His research attempts to answer questions related to Illinois Hopewellian migration into Michigan; the relationship of Middle and Late Woodland populations in Illinois and the Great Lakes area; and the apparent causes of these relationships.