Judges 2
16The Lord raised up† judges, who saved them from the power of their marauders, 17but they did not listen to their judges. Instead, they prostituted† themselves with other gods, bowing down to them. They quickly turned from the way† of their ancestors, who had walked in obedience to the Lord’s commands. They did not do as their ancestors did. 18Whenever the Lord raised up a judge for the Israelites, the Lord was with† him and saved the people from the power of their enemies while the judge was still alive. The Lord was moved to pity whenever they groaned because of those who were oppressing and afflicting them. 19Whenever the judge died, the Israelites would act even more corruptly† than their ancestors, following other gods to serve them and bow in worship to them. They did not turn from their evil practices or their obstinate† ways.
Sorta sums up the book of Judges for us right at the start...