The archaeological discoveries at Stonehenge and Easter Island mainly s remarkable examples of early man's ability to?

The discovery that very large and heavy stones at Stonehenge and that very large and heavy Moai heads at Easter Island had been moved great distances are viewed as remarkable. These examples of early mans' ability to transport large and heavy pieces of stone over considerable distances, and the ability to erect these same stones in their chosen location, using only primitive tools allegedly would prevent serious problems today, even for people equipped with heavy machinery.