The New World Falls to the Old

We are all beneficiaries of European exploration and conquest of the New World.  We all experience the luxuries and freedom afforded us as Americans.  There is an expression that states, "The end justifies the means" which means that the outcome of something justifies the way in which it was achieved.   In your opinion, do you think this is the case regarding European discovery and conquest of the Americas?  Explain your answer.