<span>Personality is plastic, but a person's personality will be affected lifelong by the different experiences that an individual had gone through he/she might or might not learn from it bu for sure this has an effect on his/her personality as a whole. Hope this helps.</span>
I think the voyage of Amerigo Vespucci was the most important because it showed all of Europe that what Christopher Columbus thought was the indies was actually new undiscovered land.