Read the passage and answer the question: In the past, India was known for her fine textiles, muslins and brocades of silver and gold. The ancient Indian iron and steel industry was equally famous. The famous Damascus steel for swords and armours used in crusades came from India. Thus in countless industries and crafts, the Indian craftsmen, builders, workers and artists created and prospered. Later, political disintegration and foreign conquest closed the long golden chapter of India's advancement and creative achievement. Which of the following is opposite in meaning to the word "advancement" occurring in the passage?