I agree with the other comments but remember how different things are now.
Back in Jefferson’s time, there were thousands of small newspapers, they were usually just a page or two and they were all independent. Today corporations own most newspapers and they force them to toe the company line when it comes to what they can print. TV and radio are worse, most are just propaganda outlets (Fox is among the worst) and are in the entertainment business not in the news business. The PBS stations are independent when it comes to local events but most get national news from PBS or NPR, they are pretty good but they are slanted to the left.
You have to be very careful who you trust, the foreign sources are best because they don’t gain much by pushing one view or another. Even there you have to be sure they aren’t just a mouthpiece for China or Russia.
Efficient system of government, able rulers, and a strong military. Granting citizenship<span> to foreigners helped ensure their loyalty to </span>Rome<span>. ( got this from the internet. its not my own words )</span>
The main cause was the World War I Peace Treaty, the Treaty of Versailles. The Treaty of Versailles is responsible for World War II for a number of reasons including, providing false hope, pushing things too far, the cause of German reparations, redrawn boundaries, and the creation of weaker nations.