Answer:
A strong naval blockade
Explanation:
During world war 1 Germany wanted to starve Britain of supplies so they began an unrestricted submarine war sinking any ship that went towards the British mainland. In the beginning, it was bearable but after a few years, Germany started to suffer due to low rations and no import of materials needed for the war. At the end of the war, food was scarce, equipment was hard to produce and there was no money to fund the war effort.
A ruler acting as or like a tyrant would be something like Hitler or someone that ruled with "an iron fist" (or ruling using fear/manipulation)
The facts that Jefferson present in this sense are appeals to human reason. Jefferson wants to show that it is a natural fact that humans should be free from tyrannical governments.
Great Britain owned the most colonial territory around the world.