According to some sources, the term Hardal was created at a meeting of the youth group EZRA in 1990. (Ezra is the Poalei Agudah youth group associated with Torah im Derech Eretz.) In later years, the term Hardal became a group that actually started separating itself from the broader religious Zionist community in order to dedicate itself to leading a life dedicated to strict Jewish practice, without the influence of outside culture. There was stress placed on modesty in dress and early marriage. Rabbi Shlomo Aviner was a major ideologue for this group.
All Hardalim built their thought on the writings of Rabbi Abraham Isaac Kook as interpreted by his son Rabbi Zvi Yehuda Kook. This approach gives a great role for faith, emotions, and messianism in Judaism. They also stress the study of Yehudah Halevi's Kuzari and the writings of the Maharal of Prague.
In recent years, it refers to those under the influence of Rabbi Zvi Yisrael Tau, who left Yeshivat Merkaz Harav to found the more Hardalic Yeshivat Har Hamor. Rabbi Tau rejects secular studies and secular influences. He is also against any academic influence on teachers colleges, rejecting the influence of modern educational psychology and modern approaches to the study of Bible. Those who follow this approach are called followers of Yeshivat HaKav- "Yeshivot that follow the line."
The term Hardal is sometimes used to refer to those coming from the Haredi world who join Nahal Haredi (the shortened army service for Yeshiva graduates) and continue to live within the broader Hardal world. It is also sometimes used for American Yeshivish Jews who moved to Israel and support the state.
The disengagement plan lead to a schism within the movement. Har Hamor Yeshiva (with whom most members of the group are identified) taught that Torah study and prayer were no less important than physically resisting the disengagment, and thus fewer people took part in protests and political lobbying. Others within the movement, however, advocated more direct confrontation.
Following these events, much of the Hardal public abandoned the political parties which they had traditionally supported (such as the Mafdal) and began to support newer parties, such as Tkuma and Renewed National Religious Zionism (the two members of the National Union.
Some have ceased waving the Israeli flag, saying prayers for the State of Israel and no longer celebrate Independence Day. On Independence Day, when millions of Israelis attach Israeli flags to their cars, some of these Hardalim refused to wave the flag. A handful even attached black flags with orange ribbons (signifying opposition to expulsions from Jewish villages in the West Bank). The custom of black flags on Independence Day comes from the Haredi anti-Zionist world, most notably Neturei Karta. Others Hardal leaders, particularly Rabbi Shlomo Aviner, have declared that they continue to support the State regardless.
This schism process was accelerated after the Israeli Police, attempted to evict extremist youths who came to protest against the expulsion and demolition of a group of houses in the West Bank Jewish village of Amona, near Jerusalem, after which allegations arose of police and army abuse of the protesters.
Others strongly reject his loyal attitude towards the State, often termed as "Mamlachti'ut". One such Rabbi who opposes Rabbi Tau's approach is Rabbi Tal, who has instructed his students to cease celebrating Israeli Independence Day due to what many see as a betrayal of Zionist ideals by the Israeli government.
Most Hardalim fall somewhere in between.
Other important Rabbis and thinkers of the Hardal movement are: