Complex sentence: Through the 1890s and into the 20th century, he would acquire only more expertise, which led him being elevated to higher positions of status, which gave him even more opportunity to excel in his profession and for other entomologists to elaborate on his work.
Split into simpler sentences: Through the 1890s and into the 20th century, he would only grow further in expertise. This led him being elevated to higher positions of status, which gave him even more opportunity to excel in his profession and for other entomologists to elaborate on his work.