Before Kalshi and Polymarket there was the Iowa Electronic Markets

Prediction markets leverage the "wisdom of the crowd" to forecast events, often outperforming traditional polling methods by incentivizing participants to accurately reflect their beliefs with money. While modern iterations like the Iowa Electronic Markets gained prominence in 1988, these mechanisms have deep historical roots, appearing as early as the 16th century and serving as a robust, public feature of American political life until the mid-20th century. Economic historians Paul Rohde and Coleman Strumpf note that these markets faded as scientific polling became more prevalent and horse racing offered more frequent betting opportunities. Despite their temporary disappearance, the success of the Iowa experiment proved that market-based forecasting remains a potent tool for gauging public sentiment and predicting complex outcomes, ultimately paving the way for contemporary platforms that allow trading on a vast array of current events.