We are indebted to those who have gone before us. It is tempting to imagine that our accomplishments are our own, but in fact they are not. We use tools, intellectual and physical, created and used by those who have gone before us. In fact is is as if we are standing "on the shoulder of giants"
The more we learn from those who gone before the higher we stand on mighty shoulders. We can think thoughts that they have made possible and we can take actions that would have been impossible for them thanks to them. History studied gives us and those we serve an edge because we can think thoughts we all need now and in the near future.
When we refuse to learn from history we are simply standing lower in the universe of ideas and have further to climb to get where we could have been. Not to know and give credit to those whose "conversations" we have shared with those who went before us means we will be forced to muddle through many of the same situations they have already conquered. George Santayana said, "Those who cannot remember the past are condemned to repeat it."
When preparing your communication, look back, hold a "conversation" with those who have gone before. Stand on their shoulders, the view is great. And you will be far better prepared to help those you serve everyday.