Complex sentence: Weber's main intellectual concern was understanding the processes of rationalisation, secularisation, and "disenchantment" that he associated with the rise of capitalism and modernity, and which he saw as the result of a new way of thinking about the world.
Split into simpler sentences: Weber's main intellectual concern was understanding the processes of rationalisation, secularisation, and "disenchantment" that he associated with the rise of capitalism and modernity. He saw these as the result of a new way of thinking about the world.