Answer:
18. Southerners claimed that enslaved people were healthier and happier than northern wage workers. Most white northerners viewed blacks as inferior. Northern states severely limited the rights of free African Americans and discouraged or prevented the migration of more.
19. As an Anti-Federalist, he believed that a strong national government without a bill of rights would undermine individual freedom. Mason also significantly contributed to other documents that advanced the development of the First Amendment.