The ecological conditions of ancient Aetolia and Akarnania created an ideal ecosystem for their Palaeolithic inhabitants, who organized their lives either in the plains or in accessible caves. In any case, their settlements were situated close to sites which could serve their hunting activities and supply them, at the same time, with the necessary material for the organization of their dwellings that functioned both as shelters and workshops. Consequently, in the Middle (100,000-33,000) and especially during the Upper Palaeolithic age (33,0000-10,000), the presence and activity of man is intense in the area of the present Aetolia and Akarnania county, on selected sites, which are close to springs or near the two big rivers Acheloos and Evenos or by lakes, ravinges and swamps, and are crossed by animals or frequented by them.
This assumption, that Palaeolithic sites are located in Aetolia and Akarnania -Galatas, Kryoneri, Agrinio, Hagios Konstantinos, Diamanteika, Lyssimacheia, Zapanti, Kouvaras, Krikelo, Hagios Nikolaos— this assumption is supported by the fact that all these parts are scattered with stone tools and by-products of Palaeolithic form. Such a remarkable accummulation of Palaeolithic finds leads to the conclusion that Palaeolithic men, propably hunters,encamped in these areas.