Complex sentence: The civil and human rights initiatives of the 1960s and 1970s provided a common language for dissidents concerned with political freedoms as well as religious and national issues.
Split into simpler sentences: The civil and human rights initiatives on the 1960s and 1970s provided a common language for such diverse currents of dissent. The emerging movement served as a cause for dissidents concerned with political freedoms as well as religious and national issues.