IKAR ("essence" in Hebrew) was founded in 2004 by Rabbi Sharon Brous along with Melissa Balaban, Joshua Avedon, Stephanie Avedon, Celia Bernstein, Richard Foos, Shari Foos, Nan Friedman, Adam Gilad, Lynn Kilroy, Ross Levinson, David Light, Paulette Light, Rachel Light, Paula Mazur, Robert Mickelson, David N. Myers, Andrea Blaugrund Nevins, Yazmin Ibarlucea-Peebles, Mac Peebles, Amy Povich, Jeff Rake, Daniel Sokatch, and Adam Wergeles, in a member's living room.
Prominent members include:
- Michael Ellenberg, senior vice president at HBO
- Eric Garcetti, mayor of Los Angeles
- Rick Jaffa, screenwriter
- David Nevins, president of entertainment for Showtime Networks
- Amanda Silver, screenwriter
- Mayim Bialik, an American actor, neuroscientist, and author
- Weiner, Rex (December 30, 2012). "IKAR Looks To Build Without Losing Magic". The Jewish Daily Forward.
- Gruenbaum, Julie (June 23, 2010). "How Different Is IKAR; Rabbi Sharon Brous Inspires Change … and Controversy". The Jewish Journal of Greater Los Angeles.
- IKAR Our Story retrieved October 24, 2017
- Paideia - The European Institute for Jewish Studies: "Project-Incubator Staff - Joshua Avedon" retrieved October 24, 2017
- Jewish Jumpstart: "IKAR RISING - A STUDY OF THE FIRST YEAR OF A NEW SPIRITUAL COMMUNITY IN LOS ANGELES by Joshua H. Avedon] 2005
- Staff, Toi (June 20, 2015). "Jurassic World's Jewish writers". Times of Israel.