What was one of the main factors that resulted in the almost unchallenged power of the Mexican presidency before the 1980s

following type of cultural development caused people to want and buy new products on the market :

well it definitly does because if you are seen as weak you will be seen as unimportant and they will walk all over you and the us is the most powerful military and the largest in the world

hope this

imma say false because i dont know anything about this.

according to my research (britannica and quizlet) the first settlements were along the huang river because it could give the crops more fertile soil that really it out. this was due to the yellow slit caused by floods of the river.