Why is the development of iron as a sign of civilization Recently watched a few history videos why do you think the Mayan civilization is inferior to the other ones just not iron

Iron is as a symbol of the development of feudal society, marking the emergence of a mode of production, a way to increase productivity, because the four ancient civilizations of the ancient countries are planting, the emergence of iron greatly increased productivity, because iron a large number of refining, and cultivation to improve the speed of cultivation, therefore increasing productivity, China iron cattle plowing era appeared in large numbers is in the Western Han Dynasty, but as early as the At the end of the Spring and Autumn period and the Warring States period, China already had iron, just not popular, until the Western Han Dynasty social peace, only to get vigorously developed.

So now scholars agree that the emergence of iron is a sign of civilization in feudal society, is not wrong.

As for what you said as a sign of civilization, can iron be used as a sign of the present society? It's just a phase, you're not asking the right question.

And the Mayan civilization thing is confusing, there is no one doctrine is tenable, so you may not believe too much in those doctrines, history is not a novel, is to be logic and evidence.

As for the Mayan civilization has no other civilization is good, from the vertical point of view, is not as good as the 4 ancient civilizations, because if so good, why extinct, a little shadow is not left, the four ancient countries have three civilizations basically did not pass down, but there is still a legacy of the Mayan is a little bit of nothing, this is even a point of view of mine.