Final answer:
The High Middle Ages saw positive developments in population growth, economic opportunities, social organization, and intellectual advancements.
Step-by-step explanation:
The High Middle Ages, which began after AD 1000, saw several positive developments. One major improvement was the increase in population due to technological and agricultural innovations that led to better trade and higher crop yields. This expansion of population brought about economic growth and new opportunities. Another positive aspect was the establishment of manorialism and feudalism, which organized society and provided stability. Additionally, intellectual life flourished with the emergence of scholasticism and the founding of universities.