Emilio Jacinto y Dizon was a Filipino general during the Philippine Revolution. He was one of the highest-ranking officers in the Philippine Revolution and was one of the highest-ranking officers of the revolutionary society Kataas-taasang, Kagalang-galang na Katipunan ng mga Anak ng Bayan, or simply and more popularly called Katipunan, being a member of its Supreme Council. He was elected Secretary of State for the Haring Bayang Katagalugan, a revolutionary government established during the outbreak of hostilities. He is popularly known in Philippine history textbooks as the Brains of the Katipunan while some contend he should be rightfully recognized as the "Brains of the Revolution". Jacinto was present in the so-called Cry of Pugad Lawin with Andrés Bonifacio, the Supremo of the Katipunan, and others of its members which signaled the start of the Revolution against the Spanish colonial government in the islands.

The Katipunan, officially the Kataastaasan Kagalang-galang na Katipunan ng mga Anak ng Bayan and abbreviated as the KKK, was a revolutionary organization founded in 1892 by a group of Filipino nationalists Deodato Arellano, Andrés Bonifacio, Valentin Diaz, Ladislao Diwa, José Dizon, and Teodoro Plata. Its primary objective was achieving independence from the Spanish Empire through an armed revolution. It was formed as a secret society before its eventual discovery by Spanish authorities in August 1896. This discovery led to the start of the Philippine Revolution.