He was a major proponent and supporter of recreational mathematics for decades.

Sher was a major environmental proponent during his time in the legislature.

He is also a major proponent of the open source software movement.

The United States has been a major proponent of the project.

He had been a major proponent for progressive thought and reform in the evangelical community.

"It's a substantive issue being fought in the center, with law enforcement as its major proponent."

He was a major proponent of education for all children.

He is considered a major proponent of the Azonto genre and dance.

He was a major proponent for the development of privatelyl-owned electronic media.

James I was a major proponent of this idea and wrote extensively on it.