The 20th century saw a stupendous release of energies that had been pent up for the 250 years of Tokugawa isolation.
Many historians felt that this state of affairs was inevitable after the Tokugawa isolation.
mnli hypothesis: Many historians felt that this state of affairs was inevitable after the Tokugawa isolation. premise: The 20th century saw a stupendous release of energies that had been pent up for the 250 years of Tokugawa isolation.