What does the Bible say about representation in sin?

In Joshua 7, we see a vivid illustration of representation through the account of Achan's sin. Achan, as a member of the Israelites, committed a grave sin by taking the accursed items, which led to God's anger towards all Israel. This demonstrates the principle that when one member of a community sins, it can have repercussions for the entire group. Israel was judged not merely for Achan's act but for their collective transgression. From a Reformed perspective, this reflects the reality of sin entering through one man, Adam, as discussed in Romans 5:12, showing how representation operates in both condemnation and justification.