Ask yourself, what would be the purpose of this supposed "conspiracy" to deceive billions of people regarding the shape of our planet? At what cost, if our planet is indeed flat, is this "conspiracy" perpetuated? What is the benefit for the "conspirators" of this "hoax?"
The spherical reality of this planet has been proven by Hellenes at least 200 years prior to Christ. I recommend reading about Erestothenes and his elegant experiment and calculations. No sane man for the past 3000 years has ever believed in the nonsense of "flat" earth. The term "flat earth" was invented by the mediocre American writer Washington Irving to mock the Catholic Church in one of his moronic fictions.