Smith travelled extensively preaching throughout the Pacific, Australia, New Zealand, the United Kingdom and around the world.
For Barry Smith, a one world government would be satanic and evil, a belief taken from his study of biblical prophecy.
He talked about the detail of the "great seal" on the US$1 bill, linking the symbolism to Freemasonry, and the layout of certain landmark buildings in Washington DC in which he claimed could be found the Masonic square and compass, and the inverted pentagram.
Smith wrote several books (see details below) and gave regular public addresses, usually to audiences at churches both in major cities and small towns all around the world.
Smith was a proponent of the 9/11 conspiracy theories, claiming that the 11 September attacks were orchestrated by the US federal government.