A Treatise of Taxes and Contributions Shewing the nature and measures of crown-lands, assessements, customs, poll-moneys, lotteries, benevolence, penalties, monopolies, offices, tythes, raising of coins, harth-money, excize, &c.; with several intersperst discourses and digressions concerning warres, the church, universities, rents & purchases, usury & exchange, banks & lombards, registries for conveyances, beggars, ensurance, exportation of money [&] wool, free-ports, coins, housing, liberty of conscience, &c.; the same being frequently applied to the present state and affairs of Ireland.

"A Treatise of Taxes and Contributions" by Sir William Petty is a 17th-century historical study that examines the systems of taxes and contributions within England and Ireland's economics and government. The book studies numerous financial tools like land tax, customs duties, excise taxes, charity and government expenses, as well as the social and political effects of taxation on the population. Petty starts by discussing tax law's necessity, specifically in Ireland under English rule, and points out how having a military affects a people who are already at risk, while suggesting changes to local government. Petty stresses how important it is to understand economic activity and how wealth is spread out in order to make tax laws and public policy better, which provides a base for his ideas about effective tax systems and public funding. The introduction shows Petty's goal of doing a full assessment to improve both governance and the well-being of people, especially for Ireland's future harmony.