Complex sentence: Economies have been surging for decades, in part due to large new players entering into global competition and compares it to the economic surges of the 1890s and the 1950s which also saw new players become global powers.
Split into simpler sentences: Economies have been surging for decades, in part due to large new players entering the global market place. He compares this era's economic growth to the economic surges of the 1890s and the 1950s which also saw new players become global powers.