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Development of Tools Throughout Time Our world today has many different kinds of tools. I realized this when I was walking through The Home Depot a few weeks ago. On one isle are nails, and screws, the next isle there are power drills to go along with power saws and power sanders. Now imagine the world with no tools, no nails or screws. It would be pretty difficult to do most anything. We would have no houses to live in, no cars to travel to work in, and we would have no place of employment in which to work. Without tools our world would be nothing. This is the world our ancestors faced, and they had nothing but rocks and sticks. Homo Habilis had the challenge of being the first hominid with a larger brain, which allowed him to have the ability to do more things. With early hominids lacking size and strength to kill large animals they used certain objects to kill and devour these animals. This ultimately led to the development of tools. By 2.5 million years ago, a new human evolutionary trend had begun. The change to a upright bipedal posture, and existing flexibility at the shoulder, arms, and hands allowed hominids to carry and manipulate objects much more readily. Early hominids began to manipulate the physical world, in