What was roger williams' belief about the price of goods?

In hand stitched dreams which clue tells you that the historical period of the events will be important in the story

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

During the era of european expansion, what was the biggest reason for spain’s push for exploration?