What brought an end to the dominance of the Silk Road?

An excess of sea routes

Explanation:

The Silk route was dominated by the Muslims in the Middle East, which often led in the clash and unrest between the two religion (Christians and Muslims). The increasing rates of the goods brought from Asia through land route (Silk route) became expensive. To solve this problem a new route was to be found. Therefore, the age of exploration began in Europe.  Vasco da Gama found his way to India and later for the Far East in the 15th century dealt a  blow to the Silk Route.