Which passage from the declaration of independence conflicts with the practice of slavery

The passage would be one of the mos famous one's "We hold these truths to be self-evident, that all men are created equal". Hope this helps. (ﾉ◕ヮ◕)ﾉ*:･ﾟ✧

In the late fifteenth century, a major world power that established colonies in the era of old imperialism was france or germany or spain. their colonial activity was mainly limited to america or africa or asia.