Men have a sufficient natural instinct for what is true, and usually do arrive at the truth.
In the past, missionaries have traveled to far countries with the message of the gospel - with great hardship and often with the loss of life. In contrast, we can reach millions instantly from the comfort of our homes by merely hitting the 'send' button on our computers, or with iPads, or phones.
In my early life, and probably even today, it is not sufficiently understood that a child's education should include at least a rudimentary grasp of religion, sex, and money. Without a basic knowledge of these three primary facts in a normal human being's life --subjects which stir the emotions, create events and opportunities, and if they do not wholly decide must greatly influence an individual's personality --no human being's education can have a safe foundation.
As far as many statistical series that are related to activities of mankind are concerned, the date that divides human history into two equal parts is well within living memory. The world of today is as different from the world I was born in as that world was from Julius Caesar s. I was born in the middle of human history, to date, roughly. Almost as much has happened since I was born as happened before.