Determined conviction for an idealistic cause that craves consensus and is intolerant of dissent. Zeal may take the form of value convictions, communal commitment, closed-minded certainty, angry jingoism, religious fervor, or political extremism.
McGregor, I., Gailliot, M. T., Vasquez, N. A., & Nash, K. A. (2007). Ideological and personal zeal reactions to threat among people with high self-esteem: Motivated promotion focus. Personality and Social Psychology Bulletin, 33(11): 1587-1599. doi: 10.1177/0146167207306280.
McGregor, I. (2006). Offensive defensiveness: Toward an integrative neuroscience of compensatory zeal after mortality salience, personal uncertainty, and other poignant self-threats. Psychological Inquiry, 17(4), 299-308. doi: 10.1080/10478400701366977.