Here are some one liners...
Saint Peter's Flood and the Problem of Global Cooling -- I've talking about similar subjects. Several storm surges change the Islands near Germany and flood Amsterdam. You know that if this happened today it would be called man-made Global Warming even though the actual problem is nature.
The Deluge in Ukraine and the Problem of Winning a War -- Poland beats the tar out of Ukraine... just barely... but Poland fails to learn their lesson because they won, and even though several problems were exposed... they won! Why change? Because they are about to lose everything.
The English Navigation Act and the American Revolution -- England creates a monopoly by passing a law that their citizens use only British shipping. I talk about monopolies.
Saint Peter's Flood and the Problem of Global CoolingA series of storms in the North Sea have produced storm surges that are collectively called Saint Peter's Flood. The Island of Juist off the coast of Germany is split in half when its sand dunes are washed away. Bodies are washed up all the way to Fulkum Warf and then buried in the backwash. 15,000 souls are lost. Dikes collapse and Amsterdam is flooded. The dual Islands of Juist will be rejoined into a single island in 1932 but the connecting dunes will remain vulnerable to North Sea flooding so additional barriers will be erected to protect them from erosion. These artificial barriers will create their own unique ecosystem that will be studied in the modern day.     
The Deluge in Ukraine and the Problem of Winning a WarThis is not a flood of water. It is a flood of troops and cavalry as the single largest military engagement of the century kicks off with over 280,000 men near the town of Berestechko. With 80,000 Polish mercenaries on one side and 200,000 Ukrainian peasants, Cossacks and Crimean Tatars on the other, it should be a slaughter and it is. The Cossacks and Ukrainians are killing off the local nobles so the Polish Prince Jeremi leads an army of mercenaries to find the Cossacks. The Prince meets with initial success by killing the Crimean cavalry leader the 1st day. The 2nd day in a miracle that is difficult to believe (but something like it must have happened) the Prince leads a charge into the teeth of the Cossack defenses using nothing but his horse, a saber and a few thousand mercenaries. This should have been impossible, but it helped that the Tatar leadership was killed by Polish artillery and a severe storm later produces so much mud and confusion that the Cossacks are trapped next to the river and destroyed. In the end, 700 Polish troops are killed compared to 20,000 to 30,000 Cossacks and Crimeans.    
Virginia grows a lot of tobacco but British shipping doesn't have the capacity (or efficiency) to handle the production so Virginia tobacco farmers have been turning more and more to Dutch shippers. After all, Dutch slaver ships are coming in regularly to provide a labor force for tobacco farmers so they already have a working relationship with the Dutch. (Those b@stards! Oh. I'm sorry. I meant to say, "Those businessmen!" Business can be as much a force for bad as a force for good.) The Puritans are the killjoys of the 17th century and they are running the English Parliament, so they pass the English Navigation Act. This is the first of a series of laws that will limit Virginia's and New England's shipping options to only one. English shipping now has a monopoly by rule of law. All hail Britannia. The Navigation Act will produce short-term gains for English shipping and long-term consequences for the world. The most strange consequence is that it will create a national identity for Norwegians as well as for Englishmen living in North America.  
This Year on Wikipedia
Year 1651, Wikipedia.