This core value of the enlightenment thinkers said that over time humankind can and should improve

Explanation:

The core value to Enlightenment thinkers was logic reasoning, they didn't concerned about religion and that stuff, because they didn't believe that's the way to improve humankind.

So, in order to achieve constant improvement they use reason and logic reasoning, that's why they valued so much science, life, liberty and property.

ernest bai koroma (president) loko christianity

ahmad tejan kabbah (president) mandingo islam

johnny paul koroma (military junta limba christianity

julius maada bio (military junta mende christianity

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.