How did the world change after oceans became highways?

When oceans became highways, global trade flourished as shipping routes expanded, significantly reducing transportation costs and time. This led to increased economic interdependence among nations, fostering cultural exchange and collaboration. Environmental impacts emerged as shipping pollution and overfishing escalated, prompting a re-evaluation of maritime policies. Ultimately, the transformation of oceans into highways reshaped geopolitics, economies, and ecosystems worldwide.