  A new proof of the classification for tensor ideal thick subcategories of the
bounded derived category, and the stable category, of modular representations
of a finite group is obtained. The arguments apply more generally to yield a
classification of thick subcategories of the bounded derived category of an
artinian complete intersection ring. One of the salient features of this work
is that it takes no recourse to infinite constructions, unlike the previous
proofs of these results.
