Subsequently, Hall worked on a Middle East peace initiative in collaboration with the Center for the Study of the Presidency.

After college, Hall served as Peace Corps Volunteer in Thailand, teaching English in 1966 and 1967, an experience that contributed to his strong interest in world hunger issues.

Hall was first elected to the U.S. House of Representatives in 1978, to succeed 12-year incumbent Charles W. Whalen Jr., a moderate Republican.

As a measure of how popular he was in the Dayton area, he was unopposed for reelection in 1984 even as Ronald Reagan carried the district in a landslide.

He made frequent trips to more than 100 countries such as Sierra Leone, Ethiopia, Sudan, and North Korea where hunger was widespread.

With Tom Price, Hall wrote Changing the Face of Hunger: One Man's Story of How Liberals, Conservatives, Democrats, Republicans, and People of Faith Are Joining Forces to Help the Hungry, the Poor, and the Oppressed (2007).

Under a $1 million grant from U.S. Secretary of State Condoleezza Rice via the U.S. Agency for International Development, to be applied to both economics and faith-based efforts, Hall was to work with religious leaders to help prepare the way for peace in the Middle East.

Hall also serves on the Board of Advisors of Opportunity International, a charity that seeks to end poverty through microcredit lending to entrepreneurs.

[7]"He also served as the Capital Chair for the Gem City Market, a co-op grocery store, and lead a successful effort to raise $5 million.