No he did not die a few weeks after he became president. He was the third President of the United States from 1801 to 1809
It's b pretty sure before the plague Europe suffered from overpopulation and unsanitary environment that was greatly fixed after most of Spain and Europe was wiped out leading the people left over to fix the problems
Thomas Hobbes and John Locke were two political philosophers of 17th century England who tried to give an explanation about the origin of government. They both reacted against the Divine Hereditary Right of monarchs and developed a theory that maintained that civil governments were the result of a social contract, thus, governments were an affair purely of this world and not something established by divine authority.