How did Enlightenment ideas about liberty, natural rights, and human dignity apply to most of the world's people in the eighteenth century?

Answer: ideas of Enlightenment expressed aspiration of most Europeans in the 18th century. Application of these ideas was possible also because of certain degree of secularization and schooling.

Explanation: There were not so many centers of Enlightenment in 18th-century but ideas were spreading quite quickly and because people had more and more schooling and education they were able to understand new ideas and apply them. However, societies were still unjust with quite degree of inequality ... and some ideas had to be put in practice in a revolutionnary way.

In many ways, Enlightenment ideas about liberty, natural rights, and human dignity applied to most of the world's people in the eighteenth century in the sense that "Enlightenment ideas were meant only for people of western Europe and North America."