Yes, the world has changed greatly since God gave the Ten Commandments to His people almost 3,500 years ago, but if anything, that makes them even more important to us today, not less so.
Why do I say this? One reason is because we live in a time of great moral confusion - and all around us we see the results of that chaos. To put it another way, we've lost the meaning of right and wrong, and we make up our own rules for how we'll live. But those "rules" will never bring us lasting happiness because they only lead to instability and conflict. Isn't it time for us to turn back to the solid and unshakable laws that God has given us? Since He made us, doesn't He also know what is best for us? Of course.
But there is a deeper reason why the Ten Commandments are still valid for us today. Yes, times change - but God doesn't change, and neither does our basic human nature. We need His guidance just as much today as people did thousands of years ago. The Bible says, "Keep his decrees and commands... so that it may go well with you and your children after you" (Deuteronomy 4:40).
Don't be misled by those who say we don't need to bother with God or His rules for living. Instead, open your heart and life to Jesus Christ, and then make it your goal to follow God's will every day. His way is always best - without exception.