Final answer:
The most significant change brought about by the Republican Revolution was the 1996 Personal Responsibility and Work Opportunity Reconciliation Act, which implemented time limits on welfare benefits and mandated work for recipients.
Step-by-step explanation:
The most significant change wrought by the Republican Revolution was the 1996 Personal Responsibility and Work Opportunity Reconciliation Act.
After assuming the majority, the Republicans focused on implementing conservative reforms, a significant piece of legislation being the Personal Responsibility and Work Opportunity Reconciliation Act, which was signed into law in August 1996. The Act brought reform by setting time limits on welfare benefits and requiring most welfare recipients to begin working within two years of receiving assistance. This welfare reform was part of the broader agenda outlined in the Contract with America, the Republicans' commitment to legislative reforms if they took control of Congress following the 1994 midterm elections.