Abu Bakr vs Cleisthenes

Abu Bakr launched military campaigns against Arabian tribes that renounced Islam or refused to pay zakat after Muhammad's death. The wars, led by generals like Khalid ibn al-Walid, reestablished Muslim control over Arabia and consolidated the caliphate.

After the death of Muhammad, Abu Bakr was elected as the first caliph (successor) at Saqifah. His election unified the Muslim community, though it caused controversy among some supporters of Ali. He became the leader of the nascent Islamic state.

Abu Bakr ordered the compilation of the Quran into a single written manuscript after many memorizers died in the Ridda Wars. Zayd ibn Thabit collected verses from various sources, creating the first official codex, which later served as the basis for Uthman's standard text.

Abu Bakr died after a brief illness, having designated Umar as his successor. His caliphate lasted only two years but established the foundations of the Islamic state, including the expansion beyond Arabia and the preservation of the Quran.

Cleisthenes, with the support of the Alcmaeonid family and Spartan assistance, led the overthrow of the tyrant Hippias, son of Peisistratus. This ended the Peisistratid tyranny in Athens and opened the way for democratic reforms.

Cleisthenes reorganized the Athenian citizen body into ten new tribes based on demes, replacing the old four Ionian tribes. He established the Council of 500 (Boule) and introduced ostracism, creating a system of isonomia (equal rights) that is considered the foundation of Athenian democracy.

Cleisthenes instituted ostracism, a procedure allowing Athenian citizens to vote annually to exile a prominent citizen deemed a threat to democracy for ten years. This mechanism aimed to prevent the rise of a new tyrant and stabilize the democratic system.