Eyen is considered a principal proponent of the 1960s neo-expressionist off-off-Broadway movement.

Many proponents of the anti-slavery movement had to deal with the bloody results of their efforts in a personal struggle of conscience.

But many proponents of the law-and-literature movement cite another reason.

Although proponents of the movement say they have scientific support for their views, critics are unconvinced.

Most important, he was a strong proponent of the ecumenical movement.

Many proponents of the car-free movement see the planning policy as a positive move forward.

As he was the main proponent of the movement, it faded after his death.

He has generally been a proponent of the movement and supported many of the movement's aims.

In 1867 he was a proponent of the pro-confederated movement under Ambrose Shea.

He was an enthusiastic proponent of the Scouting movement.