Final answer:
The abolitionist movement and the eventual abolition of slavery through events like the Emancipation Proclamation and the adoption of the 13th Amendment embody ideas directly opposing slavery. Such transformative events are substantiated by historical records, not violating any laws of nature, but representing a profound societal shift.
Step-by-step explanation:
The event that was based on ideas in direct contrast to the ideas expressed in the statement about the contradiction between the ideal of equality and the reality of slavery is likely the abolitionist movement and the eventual ending of slavery, signified by events like the Emancipation Proclamation and the adoption of the 13th Amendment. These historical moments were grounded in the belief that all individuals, regardless of race, should be free and equal, which directly challenges the institution of slavery that was in stark violation of these principles.
In addressing the criticisms mentioned, the event of ending of slavery does not violate the laws of nature, but instead, it was a moral and societal change driven by human action and the evolving conceptualization of human rights. To establish the occurrence of such transformational events, historical documentation, legislative records, and personal narratives from the era are typically used as evidence.
Moreover, in crafting a thesis statement, as indicated in the third block of text, it is necessary to take a position that can be substantiated by evidence and that acknowledges possible opposing viewpoints. The thesis should argue that there is a contradiction, as in the case of the incompatibility between stated ideals and the practice of slavery, and provide textual or historical evidence to support that assertion.