Why did European powers allow Charles V to be the leader of the Holy Roman Empire and Spain but not Louis XIV’s grandson to become king of France and Spain?

Because the English were not yet strong enough to forcefully intervene in European affair at the beginning of the sixteenth century, but, they were strong enough by beginning of the eighteenth century. The English have always opposed hegemony in Europe, and favored a balance of powers there. They hadn’t the power to do anything much about it when Charles V became leader of the Holy Roman Empire and Spain, but, they had the money, men, and naval power to intervene to prevent France and Spain from being united, when the occasion arose almost two centuries later. In the intervening two centuries, England had become a world superpower, particularly at sea and commercially, and, they had no reason to tolerate direct competition from a united Spain and France by that stage. https://www.quora.com/Why-did-European-powers-allow-Charles-V-to-be-the-leader-of-the-Holy-Roman-Empire-and-Spain-but-not-Louis-XIV-s-grandson-to-become-king-of-France-and-Spain