The doctrine of nullification was one of the most important threads developed in the American political and legal papers published in the early Republic. The doctrine functioned as an element of Republican constitutionalism whose foundations grew in the millieu of democratic republicans in the last decade of the 18th century. The nullification was tantamount to the right of the States to annul the federal laws that the States found to be inconsistent with the federal Constitution. The doctrine of nullification is detectable in the papers written by John Taylor but its formulation is due to Thomas Jefferson who drew up its assumptions in the project of the Resolution of the Kentucky in 1798. In the course of time the doctrine laid the foundations for the procedure designed to settle disputes within the American federal system and functioned as an alternative device vis-à-vis the judicial review.