"Less confidence can be placed in proxy-based reconstructions of surface temperatures for A.D. 900 to 1600, said the committee that wrote the report, although the available proxy evidence does indicate that many locations were warmer during the past 25 years than during any other 25-year period since 900. Very little confidence can be placed in statements about average global surface temperatures prior to A.D. 900 because the proxy data for that time frame are sparse, the committee added."
Don't ask me, ask the National Academy of Sciences, and note that this report cast considerable doubt on the original paleoclimate "Hockey Stick", particularly for quantitative comparisons before 1600.
I.e., regarding global temperatures ~1000 years ago, it cannot reliably be said that it was warmer then than now. It cannot be reliably said that it was cooler then than now. All that can reliably said is that it appears it was warmer for the period 900-1300/1400 and for the period 1850-present than the period in between (commonly known as the Little Ice Age).
"I.e., regarding global temperatures ~1000 years ago, it cannot reliably be said that it was warmer then than now. It cannot be reliably said that it was cooler then than now. All that can reliably said is that it appears it was warmer for the period 900-1300/1400 and for the period 1850-present than the period in between (commonly known as the Little Ice Age).'
So we can't say it was warmer or cooler BUT we can say man evolved based on the evidence of a couple bones found 4 miles apart. I guess it all depends on your agenda.