The correct answer is: "He developed mathematical principles"
René Descartes (1596 – 1650) was a French philosopher, mathematician, and scientist who lived more than 20 years in the Dutch Republic and was one of the main figures of the Dutch Golden Age.
His great influence in mathematics has been his major contribution to the Scientific Revolution, although his work in philosophy is outstanding too. He developed the the Cartesian system of coordinates. He is considered the father of analytical geometry, which connects both algebra and geometry and which has been used in the development of infinitesimal analysis and calculus .
Answer:
It would be more difficult to pass Democratic policy ideas through the House between 2008 and 2010, compared to after the 2010 election.
Veterans coming out of WWI had a lot of trouble successfully integrating themselves back into society because of the shell shock they obtained from the endless fighting, disease, and death they experienced in the trenches
