What are three social achievements of Charlemagne?

Charlemagne was instrumental in helping Western Europe exit the Dark Ages, during which very few cultural or social advancements were realized.

One of Charlemagne's core social achievements was to allow all classes to participate in commerce. Charlemagne mandated that all of Europe should use the same silver currency. This led to an increase in trade and a boom in the economy.

Charlemagne also was instrumental in facilitating the spread of Christianity across Europe. In fact, he played such a large role in the spread of the Christian faith that Pope Leo III crowned him emperor of the Romans.

Charlemagne was a strong proponent of education as well. In addition to desiring to improve culture and literacy, he also desired to educate the clergy. In turn, the clergy was able to undertake many of the administrative tasks associated with government service as well.