The Leandro L. Alejandro Foundation (LLAF) was founded after the murder of Leandro L. Alejandro in 1987; Alejandro, born 1960, a student leader and political activist during the Marcos regime and one of the founders of the `Anti Imperialist Youth Committee' and the `Youth for Nationalism and Democracy'; as founding member and secretary-general of the Bagong Alyansang Makabayan (BAYAN), a national coalition of left-wing organizations and parties, he took the position of critical engagement during the Snap Elections, which overthrew the Marcos regime and leaded Aquino to power; he run for Congress in 1987 under the new political party Partido ng Massa (Party of the Masses); at the height of the campaign he was killed at the age of 27 in September 1987; the LLAF, stimulating the peace process under president Ramos, organized in the early nineties a Peace Network, in which Alejandro's widow Lidy Nacpil-Alejandro played an important role; the Institute for Critical Studies in Quezon, founded by the LLAF, is a place for reflection and research for the left-wing movement.

The archives were donated to the IISH by Liddy Alejandro in 2001; with accruals in 2008 and 2013.

Correspondence, press clippings and other documents on the peace process, the peoples' caucus, elections, campaigns and political parties; on human rights, the political and economical situation, environmental issues and the nuclear and military bases 1986-1995; on the conference on Peace and the Peace Process in October 1992, sponsored by the LLAF and creating the Peace Network 1992-1995; a few personal documents from Lidy Nacpil 1965-1995.

Documents on the Gabi ni Lean. Pag-alala, an evening of music, poetry and remembrance of the late activist-thinker Lean Alejandro on July 10, 2007, in PETA Theater Center, New Manila, Quezon City 2007 and some other memorating activities in that year.

Digital material: on Lean L. Alejandro Photo Exhibition.