Why did Sunni scholars precede Shia scholars in the sciences of history, language, rhetoric, and sociology?

Answer

In the name of Allah, know, my son, that when the Sunnis closed the path of ijtihad (independent reasoning) upon themselves and relied solely on the four imams, they were left with no path other than that of history. They did not grasp the sciences of hadith and jurisprudence related to Islamic law; hence, they depended on the old works of jurisprudence and legal theory. As for the Ja‘fari scholars, since they—by Allah’s help and guidance—practice ijtihad and istinbāṭ (deduction), the field of expansion and advancement in uṣūl al-fiqh (principles of jurisprudence), fiqh (jurisprudence), and the explanation of the traditions and verses of rulings is extremely vast. Those who have studied these sciences and entered their field with sincere dedication understand this well. Therefore, their intellectual efforts were divided between these essential sciences—which are the ultimate goal and purpose of the other sciences—and the disciplines you mentioned, which are regarded as preparatory and foundational to the sciences that the Ja‘fari scholars give primary attention to. Allah is the Guide and the All-Knowing.