Not sure if this is a troll question or serious, but I'll answer seriously anyway.
The Bible itself refers to the earth as being a circle. No Christian should consider flat earth to be a possibility. Plus we have pictures from space and all kinds of evidence. No human should consider it to be a possibility.
Catholicism is actually quite popular, but it's far from the most Biblical denomination. It's not generally known for teaching essential scripture, but more known for excessive ritual, and allowing clergy and leadership to determine what amount of Bible members should hear. It rarely encourages Bible reading, which is essential to living out the faith. It believes salvation is not simply through grace as scripture teaches, but also through works and sacraments and catholic-only rituals. It is the denomination of choice for most politicians. It has a seriously corrupt history that led to the reformation, and Martin Luther's 95 thesis (critcisms) of Catholic disobedience and abuse. It's historically intertwined with government and even government abuses, and still is. The pope's messages have begun to echo the political left of the USA. There is also no ignoring the thousands of child abuse and molestation cases that have arisen worldwide. Members of the church might be wonderful people, honoring the scriptures despite all this. But a huge number of people who grew up catholic rejoice in their exiting of it. They almost always find happiness at strong protestant churches with warmth, in-depth scriptural teaching, group studies, need-based ministries, mission trips, and a true sense of the holy love and spirit that defines the faith: The spirit of Christ. Many find the catholic church to echo the law over the spirit, mirroring the ways of the Pharisees that crucified Christ rather than revere Him.
The USA is chock full of brilliant people, as well as many other kinds of people. But true wisdom isn't about intelligence. A mentally handicapped person can be wise, and understand the most important things about life, which mostly come from the Bible. A brilliant person can be well versed in many subjects, yet be foolish in how they live. They are often blind to the scriptures and the truth of God. Scripture teaches that this will happen. It's a person's heart, soul, and humility that lead them to true wisdom. Wisdom leads them to true life treasure. The greatest among us are those who are too humble to call themselves great at all. The greatest among us are servants, serving people while serving God. It's our greatest purpose, and it's how we get the most out of our lives.
The most successful societies are those that are closest to God. Israel and the USA are good examples, though the USA has been going downhill as it distances itself from God. God will allow punishment to His people as they rebel.
You will seek me and find me when you seek me with all your heart. --Jeremiah 29:13
Seek and you will find. Knock, and the door will be opened.
In finding God and His truth, we realize how chock full of deception and distraction this world is. Only the Bible is truly trustworthy. It is ultimate truth. It will not fail us. We will see, when we want to see.