Final answer:
William Paterson wrote and proposed the New Jersey Plan, which called for equal representation of all states in a national legislature.
Step-by-step explanation:
The New Jersey Plan was written and proposed by William Paterson. Paterson introduced this plan as a rebuttal to the Virginia Plan, which called for proportional representation in Congress, alarming the representatives of smaller states. The New Jersey Plan, on the other hand, proposed equal representation of all states in a unicameral national legislature.