Thomas Jefferson didn't consult with Congress before deciding to buy the Louisiana Purchase
1. I believe the answer is: <span>Julius Rosenberg
</span><span>Julius Rosenberg was actually born in united states, but he was recruited by the communist League of USA in his Teenage years.
Before he was prosecuted by united states government, he managed to leak information about </span> radar<span>, </span>sonar<span>, and </span>jet propulsion<span> engines for the soviet government.
2. I believe the answer is: </span><span>David Greenglass
</span><span>David Greenglass is the brother of Etherl Rosenberg, Julius' wife in united states. Greenglass worked on the manhattan project and supply all files filled with top secret information from los angeles to Julius' residence. He receive 10 years in prison for this crime.</span>
Yes,<em> I definitely think that diplomacy needs to look different in the 21st century. There needs to be a lot less confrontation and a lot more reconciliation between countries and genuine respect for the sovereignity and territorial integrity of each country. For example, it has become obvious that the aggressive stance of the US for Cuba did not work and Cuba isn't giving up its socialist system so this has helped to thaw relations between the two countries.
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B. Because even with many issues that plagued the Roman Empire economically and politically, By the later years of the empire the Roman military was mainly comprised of trained Barbarian soliders who were inferior to earlier Roman soliders causing a significant decrease in the Roman Empires's Military capablities so many barbarian tribes that began to grow such as the Huns, Vandals, Goth etc. Put immense pressure on the Empire, driving them into the ground economically and causing many issues within the government and eventually being sacked, thus marking the end of the Roman Empire. Sorry for the wall of text but hope this helped :)
The goal of détente (the easing of tensions between nations) was to continue to resist and deter Soviet adventurism while striving for "more constructive relations" with the Communist world.
Hope this helps! :)