He founded The Yachad Council, which promoted dialogue between religious and secular Jews, and he served as honorary chairman of the Citizens' Accord Forum Between Jews and Arabs in Israel. CAF conducted activities that promoted civic engagement, encouraged active citizenship, and inspired members of the public to play an active role in formulating policies that affect their daily lives and their future. CAF worked to create dialogue and civic action groups of Jews and Arabs across the country, in cooperation with civic and community organizations, including groups of ultra-Orthodox and Arab participants, among them a group of ultra-Orthodox Jewish women and religious Arab women, with the aim of building a shared society in a sustainable democracy in Israel. While serving in the Knesset, Rabbi Melchior became concerned about the growing polarization between the different Jewish sectors in Israel. One contributing factor was the division of students in different educational streams: religious, secular, ultra-Orthodox, and Arab. These divides in the schools strengthened polarization between the Jewish sectors and reinforced a lack of common narrative, values, and vision for the future of the state. As a response, in 2001, Melchior established Meitarim - a network of pluralistic Jewish schools in Israel where religious and secular students can grow up and learn together in kindergartens, schools, pre- and post-military institutions in a non-coercive approach, enabling multiple interpretations and expressions of Jewish heritage to take responsibility for tolerance and the establishment of a collective narrative. Since 2001, Meitarim has disseminated its experimental infrastructure and curricula to over 15,000 students and instructors in collaboration with 120 educational institutions. In 2002, Melchior initiated, together with his Palestinian counterpart Sheikh Talal Sider, an inter-religious summit in Alexandria, Egypt, co-sponsored by the Mufti of Egypt, Grand Imam of al-Azhar Mosque, and Grand Sheikh of al-Azhar University, Muhammad Sayyid Tantawi; Archbishop of Canterbury George Carey; and Eliyahu Bakshi-Doron, Israel's Chief Rabbi. The summit, which launched The Alexandria Process, brought together religious leaders from the Middle-East to adopt common principles aimed at preventing the region's religious sensibilities from being exploited during conflicts, and declaring the need to work together towards peaceful solutions of the conflicts. Together with Elie Wiesel, Melchior established the Mosaica Center for Interreligious Cooperation – MERPI (Middle East Religious Peace Initiative) to "lead to the implementation" of the principles of the Alexandria Declaration and continues to serve as chair of both of Mosaica's branches. Melchior is also