英语辩论赛一辨台词

That people should never be satisfied with what they have and should always strive for something new and different seems to be a propensity inherent in human nature. We have all read in Jane Austin’s Pride and Prejudice that “It is a truth universally acknowledged that a single man in possession of a large fortune must be in want of a wife.” This only testifies to one aspect, which is also a necessary condition, of human existence.
On the most abstract level, the spirit of dissatisfaction constitutes the very force that has propelled human civilization forward in the course of human history. Stimulated by the thirst for knowledge from within and challenged by the harshness of the environment from without, man has evolved triumphantly from the most primitive to the most advanced and sophisticated. If it had contented our pristine ancestors to dwell in caves or to lead their nomadic life, they would have remained some mere vagabond creatures, lurking in the unfriendly forests an