Answer:
Not really anyone, but it started because someone from Germany killed Archduke Franz Ferdinand of Austria.
The reform to voting procedures that followed the Panic of 1819 was that men no longer needed to own property in order to vote .
The imrpoved agricultural techniques, such as the three field system, the climate change, and the horse plows. These effected Western Europe during the middle ages because the three field system produced better crops, the climate opened more land to farming, and the horse plows allowed faster harvesting. This made life a lot easier for farmers.
