Some people again thought the Dutch king had too much power. They wanted to give him less power and vote for the government themselves. In 1848 there were violent revolts against the kings of many European countries. The Dutch king was afraid the same would happen in the Netherlands. Therefore, he allowed Johan Rudolf Thorbecke to write a constitution. From then on people were allowed to vote. At first only rich men were allowed to vote. From 1919 on all adults were allowed to vote.