If Adam had made the decision not to break that 1 single command placed upon him, what would've happened to him?

If Adam and Eve didn't fall into sin, they would have remained in a pristine, unfallen state. When they sinned, they lost the supernatural gifts given to the human race by God at creation. (For example, freedom from bodily death, freedom from suffering, perfect control of the soul over the body). The forbidden fruit was a test of obedience to Adam and Eve, because God wanted to see if they truly loved Him. Overall, it is likely that if they remained pure, one of their offspring would have sinned (For example, Cain murdered his brother Abel) . Jesus then would carry out His saving work for that one person. This is how much He loves us, and therefore we must love Him back with all our heart, mind and soul. Hope this helps! - ManOfKnowledge

I thought Eve ate the fruit. and besides.... it just a story.

Life would have been pretty boring! But it's okay, God apparently knew each of us intimately before He ever created Adam. If you say God is what you say He is, then He always knew He'd boot A&E out of the Garden, He knew He'd eventually flood the earth, and force the one family He liked to repopulate the species. (please don't ponder how one family went about doing that....)

I think the world would be free of sin! We would all be saints!! Everybody on one accord and singing lovely songs we would all be without clothes because that's how it was before the serpent told Adam and eve they were naked and they became ashamed. Just one happy world! :))

You & I would not BE (exist) - so says Christianity!! Funny though!