Why is the Middle Ages considered a very important period in the history of mankind?

The Middle Ages were a period of time that lasted over 1000 years. It was an intermediate stage in the development of mankind between the ancient world and modern times. It cannot be said that the Middle Ages were flourishing. Rather, these were dark times, the beginning of which marked the decline of the ancient world. In this connection, the 5-6 centuries are called the dark ages. In addition, there are constant feudal wars in Europe. This situation was worsened even more by the Catholic Church.