Final answer:
Cleisthenes is credited with the move to a limited form of democracy due to his reforms in Athens that allowed all male citizens to vote and be eligible for public office.
Step-by-step explanation:
The reformer who is given credit for the move to a limited form of democracy is Cleisthenes. He played a pivotal role in the establishment of democracy in Athens around the late sixth century BCE. In 508 BCE, Cleisthenes was appointed by the Athenian assembly and made radical democratic reforms. He introduced the practice of allowing all male citizens to vote and be eligible for public office, which included the poor citizens who could not serve as hoplites. Cleisthenes also had lawmakers chosen by lot and introduced new 'tribes' to diversify the representation of different social backgrounds in government. These changes laid the groundwork for what would become the first real democracy in history.
Other reformers like Martin Luther, John Calvin, and Thomas Hobbes contributed to religious and political thoughts, but it is Cleisthenes who is directly credited with establishing a form of democracy that would later influence modern democratic traditions.