I will provideauniformexplanationfor OSC in this dissertation: V2 (with itsnullsubjectand null object) is essentially a purposeclause modifying the matrix clause.
The purpose of the General Welfare clause is to provide a reason, motivation, and purpose to the proper exercise of the Powers the Constitution specifically grants to Congress.
The purpose of the establishment clause, they argue, is to ensure that state-sponsored gatherings (such as sporting events at public schools) do not endorse the viewpoint of one religious group at the expense of another.