Recommended translation:  The Government of Poland; ed. and trans. by Willmoore Kendall (Hackett Publishing: Indianapolis, 1985). Completed in 1772.

Commissioned by  a Polish political leader who sought advice about how to best structure and reform the Polish government, Considerations on the Government of Poland (1772) represented Rousseau’s attempt to apply the abstract principles of The Social Social Contract to concrete political problems.

Online:
Amazon (Recommended translation)
Constitution.org (Free access)