Homework / test Arabic to English Social Sciences Economics Article discussing Hayek's Liberal Advocacy

عدم التورط السياسي في قضايا سياسية تجعل المرء سجينا لسلسلة عمليات بطيئة قد تقدرت وتحددت نتائجها منذ عقود من الزمان

Refraining from involvement in political issues that make one prisoner of a series of slow actions whose results have been determined [ ]

Is the meaning "decade" here? "A decade ago"

Thanks.