Another early method for creating openings in walls and covering space is corbeling, in which rows or layers of stone are laid with the end of each row projecting beyond the row beneath, progressing until opposing layers almost meet and can then be capped with a stone that rests across the tops of both layers
If a politician tells you that "everybody is joining his team", then this is called a Bandwagon Propaganda. Bandwagon is a persuasive technique of propaganda, wherein others are encouraged to do the same act as what others do because the majority of the people agreed in joining them. An example of a Bandwagon technique is, "Most of the people are voting for this candidate. We should vote for him too."
