I would like to submit to you that there is not a single citizen of our great nation who would testify that nothing has changed in our country. And in the eyes of the righteous of the nation, there are many demonic strongholds that are attacking the fundamentally Christian foundation of our homeland... and appear to be winning!
But what would it look like if the Church/Body of Christ actually followed Jesus's instructions that He gave to His disciples in Matthew 16:18-19? Before we consider how those instructions could be carried out in the 21st century, let's remember the verses and their context ... Jesus says, "on this rock I will build My church; and the gates of Hades (death) will not overpower it. I will give you the keys (authority) of the kingdom of heaven; and whatever you bind [forbid, declare to be improper and unlawful] on earth will have [already] been bound in heaven, and whatever you loose [permit, declare lawful] on earth will have [already] been loosed in heaven.”
To begin, there are a couple of ways that we can discern who or what "the rock" is that Jesus is referring to. It could be Himself, who is the foundational rock and cornerstone of the body of believers who are to become the church. Alternatively, the place they were standing [in Caesarea Philippi], was at the rocky base of Mount Hermon, the exact location where the Fallen Angels descended to corrupt humankind by mating with human women. Then there is the fact that instead of the word "church", Jesus actually used the Greek word (adopted by the Romans) of Ekklesia. Jesus very deliberately used this word, and it means “legislative assembly” or “selected ones.” This is not a religious term at all, but a political and governmental term that is used many times in classical Greek for a group of people who have been summoned and gathered together to govern the affairs of a city. For Jesus to use this term means He is giving the keys of governmental authority in his kingdom on earth to the believers who will follow His commands and His Father's form of heavenly government.
This area [and those terms] would have made Peter and his fellow disciples very uneasy. They knew they were standing on ground that the Nephilim had inhabited, and in Jewish theology, the spirits of these dead warrior-kings were demons. They believed that this area, with its connection to Fallen Angels and temples dedicated to Zeus and Baal worship, was the entryway to the underworld -- the gates of Sheol, which simply means “the place of the dead” or “the place of departed souls/spirits.” (The New Testament Greek equivalent is Hades). In this case, with its history involving Fallen Angels, it was an area of evil departed spirits, or demons.