What is roosevelt’s claim about the role our forbearers in conservation?

“Conservation as a National Duty" was a speech given by Theodore Roosevelt in 1908 in front of many members of parliament. Roosevelt states that the forefathers of America wouldn't have known how much of an impact their actions would have on future generations. In general Roosevelt states that throughout history previous historic figures had no idea if their ideas would be successful and if they would help with conversation or not.

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.