Court Jurisdiction in the United States

We look at the system of court jurisdiction in the US. Jurisdiction is about a court's power to hear a case, and the United States has developed a host of different rules in this regard. We examine:

Subject matter jurisdiction
Personal jurisdiction
Implied and explicit consent
Minimum contacts test; long-arm statutes
International Shoe Co. v. State of Washington et al.
In rem jurisdiction

[normanpearson]

Isn't this making things more complicated than needs be ? Why not just " Courts", with specialist judges ?