Later, modern humans began to speak, beginning as early as 100,000 years ago. Thousands of years later, art and religion helped us make sense of the world around us. Today, human beings are facing some major changes. The world now supports over five billion people. Many of us live very well with houses, cars, and nice clothes.
Technology makes our lives even easier.
Remember, I'm sitting in the backwoods of Africa writing this. Look around at your surroundings. Well, you've helped me explore several possibilities. One, we can learn from the past. Second, we stand out from other animals in our ability to cooperate and work together.