In emphasizing the practical aspects of how we use numerals to represent natural numbers in the course of performing arithmetical computations, it is evident that the concerns which motivate strict finitism anticipate some of those which also inspired the development of complexity theory. Nonetheless, strict finitism has attracted few followers. To see why this is so, observe that (S1) makes clear that strict finitists propose to identify natural numbers with numerals such as the familiar sequence \(0,0',0'',\ldots\) of unary numerals.