Answer:
Ghostly.
Explanation:
Spectral means of or like a ghost.
The economic differences between the North and South contributed to the rise of regional populations with contrasting values and visions for the future.
The Civil War that raged across the nation from 1861 to 1865 was the violent conclusion to decades of diversification. Gradually, throughout the beginning of the nineteenth century, the North and South followed different paths, developing into two distinct and very different regions.
This is an 'adverb infinitive'. It is not a participle, either present of past, because it doesn't end in -ing. And it is not an 'adjective infinitive' since its meaning is adverbial, 'you must capture or trap the other king' IN ORDER 'to win a game of chess'. Adjective has to modify a noun, which isn't the case in this sentence.