Dangers of rewriting history

We can all agree that these women and many more have had a hand in shaping history and technology as we know it, but we cannot change how history has been written. What we can do is change how history will be written down in the future or even today. 

Having this in mind, let us ask ourselves: 

What would happen if we repeated the same mistake of not acknowledging or forgetting groups of people who have contributed to society?