Preface This paper was prepared as a very short abstract for a talk given at the XVI Valcamonica Symposium (24-20 Settembre 1998), Arte Preistorica e Tribale, Sciamanismo e Mito, and published first in the papers of the Valcamonica Symposium ”98. This edition is only corrected for some errors in writing, but has not been revised. […]