Final answer:
Jean-Jacques Rousseau is the most influential contemporary proponent of social contract theory.
Step-by-step explanation:
The most influential contemporary proponent of social contract theory is Jean-Jacques Rousseau. Rousseau's work, particularly his treatise The Social Contract, introduced the concept of the general will and emphasized the idea that a legitimate state should be guided by the will of the people as a whole, rather than the interests of a minority.