Who's right??

This past week I have been thinking a whole lot about my beliefs and opinons versus the beliefs and opinons of everyone else around me. I'm pretty stumped at this point, because it feels impossible to ever know for sure who is right. In fact, I'm starting to see that in reality there is nobody who is actually one hundred percent right. Everyone holds tiny pieces of the truth, but it is impossible for one person to hold all of it. It's just so hard for me to wrap my head around the fact that there are so many people out there who think nothing like I do, and would certainly disagree with most every value and belief that builds the foundation of my life. It's hard to think that everything I believe and know could be a complete, although unintentional, lie. Furthermore, I realized that many of my friends, all of whom are American, place a great amount of weight on holding their very own, very strong opinion. Nobody wants to conform to the beliefs of others. But once I considered this, I realized that there has to be somebody who influenced all of us to think that way. So in essence the people who urge us to form our own opinions are actually impressing their own opinons on us! Basically, I'm beginnig to think that there may be no one out there who forms their opinons or beliefs all by themselves, even though the like to think they do. Opinions and beliefs can not be formed in the absence of previous opinions and beliefs. But where in the world did it all start?