Several important social developments in the decades after World War II were underlying both this development and a similar if less-remarked renewal of vigor in more traditional fields
句子主幹是developments were underlying，其余都是從句或定語。
句子邏輯分析：社會的發展造就了兩個結果，第壹是（這項）發展，第二是重新勃發活力。
參考譯文如下：
更加傳統的行業取得了這壹進展，並且同樣重新煥發了活力，盡管並不那麽令人矚目，這都要歸功於社會在二戰後幾十年間所取得的壹些重大進步。
供參考。