The code of hammurabi was a major contribution to the development of civilization because it 1. treated citizens and slaves equally 2. ended all physical punishment 3. recorded existing laws for all to see 4. rejected the principle of filial piety

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.