There was......actually several...and some of them we carry their genes.
Read the Bible. The early species of human (like monkeys) had a diet of fruits from various trees.
And the LORD God planted a garden eastward in Eden; and there he put the man whom he had formed. And out of the ground made the LORD God to grow every tree that is pleasant to the sight, and good for food; the tree of life also in the midst of the garden, and the tree of knowledge of good and evil.
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They did not wear clothes.
And they were both naked, the man and his wife, and were not ashamed.
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Then they realized they were naked and fashioned themselves garments after one sort or another.
And the eyes of them both were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
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There was a hunt, of the bounty of the Lord's blessing.
Unto Adam also and to his wife did the LORD God make coats of skins, and clothed them.
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Abel raised sheep for food and clothing, again with the Lord's blessing.
And Adam knew Eve his wife; and she conceived, and bare Cain, and said, I have gotten a man from the LORD. And she again bare his brother Abel. And Abel was a keeper of sheep, but Cain was a tiller of the ground.
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Lot was a caveman.
Lot dwelt in a cave, his wife was a pillar of salt, and his sons-in-law were such perfect angels. They "drank wine" and told stories after a manner of speaking because had to stay in hiding from the enemies who almost broke into his house with a battering ram.