What is an example of an event that caused long term historical effects

Law which gave electricity to people living in the farm victory gardens boll weevil drought great depression franklin d roosevelt warm springs, ga new deal aaa - agricultural adjustment act ccc - civilian conservation corp rea - rural electrification adminstration ssa - social security act

How was the government that was created at the constitutional convention similar to the one proposed in the virginia plan?

Who was the first explorer to sail all the way down the mississippi river