Korupsi adalah bentuk tindak pidana penyelewengan untuk keuntungan pribadi yang melanggar hukum atau orang lain.Tujuan penelitian untuk mengetahui: 1) Pemikiran antikorupsi Ali bin Abi Thalib dalam Kitab Nahj al Balagah, 2) Tantangan penerapan pemikiran antikorupsi Ali bin Abi Thalib, dan 3) Pemikiran antikorupsi Ali bin Abi Thalib diterapkan dalam relevansinya dengan konteks Post Modern.Metode penelitian menggunakan metode hermeneutic, dengan jenis pendekatan heuristic, yaitu penelusuran fakta-fakta antikorupsi Ali bin Abi Thalib dalam kitab Nahj al Balagah. Data primer penelitian adalah kitab Nahj al Balagah , sedangkan data sekundernya adalah kitab, buku, jurnal atau sumber-sumber terkait dari internet .Teknik analisis menggunakan analisis data (content analysis). Hasil penelitian adalah: 1) pemikiran antikorupsi Khalifah Ali bin Abi Thalib berupa nasihat, khutbah, surat dan kebijakan strategis lainnya. 2) Keputusan Khalifah Ali bin Abi Thalib menimbulkan adanya resistensi dan penolakan kebijakan oleh para sahabat yang rakus kekuasaan. 3) Pemikiran Ali bin Abi Thalib relevan dengan konteks post-modern, seperti keadilan, ketegasan penegasan hukum, transparansi dan akuntabilitas. Keadilan dalam pemikiran Ali bin Abi Thalib dapat menjadi dasar dalam reformasi sistem peradilan yang lebih efektif dan transparan dalam menangani kasus korupsi.

ABSTRACT:
A criminal act of misuse or abuse of power with the goal of getting advantages that are contrary to official obligations and the truth by breaking the law to further one's own or another's interests is known as corruption. The purpose of the study was to determine: 1) the anti-corruption philosophy of Ali bin Abi Talib in the Nahj al Balagah Book; 2) the difficulties in applying Ali bin Abi Talib's anti-corruption philosophy; and 3) the application of Ali bin Abi Talib's anti-corruption philosophy in the contemporary (postmodern) context.The research method used a hermeneutic stance and focuses on Heuristic research. Heuristic research was used to gather information regarding Ali bin Abi Talib's anti-corruption efforts in the Nahj al Balagah book as a first sources while secondary sources include other books, journals, online sites related with anti-corruption beliefs. The results of the research are as follows: 1) Caliph Ali bin Abi Talib's anti-corruption ideas are presented in the Nahj al Balagah book in the form of counsel, sermons, and letters in a clear and unambiguous manner. 2) A civil war sprang out because of Ali bin Abi Talib's resolve to fight corruption. Implementing Ali bin Abi Talib's ideas on fighting corruption is difficult thing. 3) Ali bin Abi Talib's ideas reveal anti-corruption principles that are pertinent to the post-modern setting, such as justice, steadfast adherence to the law, transparency, accountability, and respecting moral and ethical principles. Ali bin Abi Talib's ideas have had a big impact on how the legal system has changed to combat corruption in a post-modern social and political environment.