China's first great canal system, which created a northeast-southwest link from the Huang He (when the Huang had a northern course) to the Huai River, was built beginning in 605 during the Sui dynasty<span> (</span>
The solution the Kansas-Nebraska Act of 1854 offered to the problem of slavery was to allow both states to determine their slave or free state status via popular vote. However, both states were widely uninhabited at the time of their admittance and thus a huge number of settlers from free and slave states swarmed upon the states to sway the vote in their favor. This resulted in tragedy in the form of attacks where free and slave supporters clashed in violent and oftentimes deadly confrontation.
Adoption of the Marshall plan in the 1940’s Cuban middle crisis in the 1960’s and then fall of the Berlin Wall in end of ‘80s early 90s
The unifier was that the church
