Final answer:
The concept of linking France and Great Britain dates back to proposals made in the 19th century, and is part of a long history of conflict and cooperation between the two nations leading to modern joint ventures like the Channel Tunnel.
Step-by-step explanation:
The idea to link France and Great Britain has a complex historical background, with longstanding conflict and cooperation between the two nations. The relationship between England and France evolved from hostilities during the Middle Ages and Early Modern Era, where both monarchies consolidated power and engaged in territorial disputes, to an eventual partnership in the 20th century that led to a stronger Europe.
The most significant early cooperative venture linking the two nations was the Channel Tunnel, a modern engineering project conceived in the 19th century and realized in the late 20th century. However, the initial concept of linking the two countries can be traced back to proposals made as early as the 19th century by visionaries who saw the possibility for such a connection.