Answer:Mahan suggests that an end to isolationism is necessary because the country's economy is expanding.
Explanation: In the given quote, Alfred Thayer Mahan emphasizes the growing production of the country as a reason for Americans to look outward. This indicates that the expansion of the country's economy is a significant factor in the need to abandon isolationism.
By looking outward, Mahan likely means that Americans should engage in international trade, seek new markets for their goods, and establish economic connections with other countries. This would allow them to take advantage of the expanding production and ensure its continued growth.
Expanding the country's economy through international trade would provide opportunities for businesses to sell their products to a larger customer base, increasing profits and driving economic growth. It would also foster innovation, as exposure to different markets and ideas can spur creativity and competition.
Furthermore, engaging in international trade can help diversify the country's sources of income and reduce dependency on a single market or industry. This diversification can provide stability and resilience to the economy, especially during times of economic downturn.
Overall, Mahan suggests that an end to isolationism is necessary because the country's expanding economy requires Americans to look outward and engage in international trade to ensure continued growth and prosperity.