The brain is the center of the nervous system in many animals. The brain is the organ that allows for thought and consciousness to exist. Humans have brains that allow for complex thought, which allows for advanced civilization to exist. The human brain is the most complex known biological object.
Conservative and Liberal Differences
According to Discover magazine, Conservatives have a larger amygdala, which involves the development and storage of emotional memories. Liberals have a larger and more active anterior cingulate cortex, which is used in detecting and judging conflict and error. This is no surprise, seeing how liberals tend to use logic, while conservatives tend to hold beliefs based on emotion, such as believing that the rich deserve so much and the poor deserve little.
The brain is split into two hemispheres. Each hemisphere has different functions. The left hemisphere deals with mathematics, science, logic, and analysis. The right brain deals with creativity, artistic expression, holistic thought, and emotion. The left hemisphere controls the right side of the body, and the right hemisphere controls the left side of the body.