I think you have a...COMMUNICATION ERROR!

How do you have a puzzle without pieces, a home without bricks, a friendship without any friends?

Similarly, if we had no alphabet, we would have no words.

We would have no symbols that stand for different expressions.

Besides gestures and small pictures, we would have no way of relaying our thoughts, much less having deep, thoughtful talks.
There is no language without an alphabet. Expressing ourselves would be a matter of voicing the first sound that comes to our heads. Laughter would come easily, but what about nervousness? We could smile, and frown, and communicate disappoval, pleasure, or urgency, but how would we describe the ice-cold taste of the passion fruit tea during the heat of the summer and the clear sharpness of it as it refreshed your palate?

It would be very difficult to say that your brother (out of your six brothers, he's one with the medium-shaggy haircut, the slim build, and the green eyes) is gravely hurt (bleeding, not coughing, so bring some bandages but no medicine is necessary, please) down by the collapsed tree trunk (because we would have enough on our plates without also having to try to build a "bridge," too) across the lake.

Would we get everything we needed in time to save the poor unfortunate brother?

Maybe not.

Maybe we would. Maybe we would rely on expressions, gestures, and emotions to communicate, and maybe we would become masters at it.

But doubtless, life is much easier with an alphabet that dictates our language and gives us an almost limitless array of words to express ourselves with.