Exercise 1: Why Cleisthenes, Not Solon, Is Credited as Democracy's Founder — Possible Solution
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The chapter's own real, verified account explains this in terms of
what kind of change each reformer actually made, not simply who came
first chronologically. Solon's real 594 BCE reforms - four property
classes, a 400-member Boule, an Assembly open to male citizens - were
genuine, real groundwork, but they left the underlying basis of
political power essentially intact: participation was still
structured around property class, and the chapter notes that archons
and the Areopagus, aristocratic bodies, still held most real power
even after Solon's reforms.

Cleisthenes' own real 508-507 BCE reforms did something the chapter
describes as genuinely structural rather than incremental: he replaced
the traditional aristocratic tribes - the very basis by which
political identity and access had previously been organized - with
ten new tribes organized by geography instead. This severed the
direct link between noble bloodline and political access altogether,
in a way Solon's own earlier reforms had not. Every male citizen over
18, regardless of social rank, gained a real, substantive political
identity as a result.

So the real distinction the chapter draws is between reform that
adjusts an existing system (Solon) and reform that changes the actual
basis the system is organized around (Cleisthenes) - the second kind
is what earns the "founder" title, even though it came later and built
directly on the first kind's own real groundwork.

ANSWER: Cleisthenes is credited as the founder because his reforms
were structurally different in kind from Solon's, not merely later in
time - Solon adjusted participation within the existing aristocratic-
tribe system, while Cleisthenes replaced that basis entirely with
geography-based tribes, severing the direct link between bloodline and
political access and giving every male citizen a real political
identity regardless of social rank.

WHY THIS WORKS AS AN ANSWER
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This identifies the real, specific structural difference between
Solon's and Cleisthenes' reforms (adjustment within a system vs.
replacing the system's own basis) rather than simply restating that
Cleisthenes is "credited as the founder" without explaining why.