What ideas are associated with the enlightenment

The Enlightenment included a range of ideas centered on the sovereignty of reason and the evidence of the senses as the primary sources of knowledge and advanced ideas such as happiness, reason, nature, progress, and liberty.

I couldn't find anything quite like your question... :(

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

the western roman empire flourished, but the eastern portion of the empire struggled.