I think a. the ban on slavery was blamed for slow economic growth , and slavery became legal in 1750.
North Vietnam launched an invasion of South Vietnam. ... The attack of two U.S. destroyers by the North Vietnamese.
The attack on pearl harbor was intended as a prevention order to keep the U.S pacific fleet from interfering with military actions the empire of japan was planning on south east Asia against overseas territory of the united kingdom, the Netherlands, and the United states. <span />
I think he meant that to be successful is to try without which implies that every time you wake up you do not think or wish about being successful it just happens without any second thought.