The man who wrote it owned other human beings. The rich Anglo-Saxon males who signed it believed themselves superior to women, Catholics, Jews, other Europeans, Native Americans, blacks, Asians, and poor white males.
It contained no development strategy, no announced intention for poverty reduction, and no nation-building Power Point presentation. For many decades afterward, anyone who took it literally would have been seen as crazy.
Yet the principles the Declaration gave in two sentences have done more than anything else for both liberty and development in the 234 years since that day.
Happy birthday, Declaration, and thank you.