diff --git a/cmd/gopherbot/gopherbot.go b/cmd/gopherbot/gopherbot.go
index 5d2c13b7..28c4c297 100644
--- a/cmd/gopherbot/gopherbot.go
+++ b/cmd/gopherbot/gopherbot.go
@@ -2462,6 +2462,41 @@ func (b *gopherbot) autoSubmitCLs(ctx context.Context) error {
 				return nil
 			}
 
+			// If this change is part of a stack, we'd like to merge the stack
+			// in the correct order (i.e. from the bottom of the stack to the
+			// top), so we'll only merge the current change if every change
+			// below it in the stack is either merged, or abandoned. If a parent
+			// change is no longer current (the revision of the change that the
+			// child change is based on is no longer the current revision of
+			// that change) we won't merge the child. GetRelatedChanges gives us
+			// the stack from top to bottom (the order of the git commits, from
+			// newest to oldest, see Gerrit documentation for
+			// RelatedChangesInfo), so first we find our change in the stack,
+			// then  check everything below it.
+			relatedChanges, err := b.gerrit.GetRelatedChanges(ctx, fmt.Sprint(cl.Number), "current")
+			if err != nil {
+				return err
+			}
+			if len(relatedChanges.Changes) > 0 {
+				var parentChanges bool
+				for _, ci := range relatedChanges.Changes {
+					if !parentChanges {
+						// Skip everything before the change we are checking, as
+						// they are the children of this change, and we only care
+						// about the parents.
+						parentChanges = ci.ChangeNumber == cl.Number
+						continue
+					}
+					if ci.Status != gerrit.ChangeStatusAbandoned &&
+						ci.Status != gerrit.ChangeStatusMerged {
+						return nil
+					}
+					if ci.CurrentRevisionNumber != ci.RevisionNumber {
+						return nil
+					}
+				}
+			}
+
 			if *dryRun {
 				log.Printf("[dry-run] would've submitted CL https://golang.org/cl/%d ...", cl.Number)
 				return nil
diff --git a/gerrit/gerrit.go b/gerrit/gerrit.go
index 4b6cccce..93de7486 100644
--- a/gerrit/gerrit.go
+++ b/gerrit/gerrit.go
@@ -1045,3 +1045,31 @@ func (c *Client) GetRevisionActions(ctx context.Context, changeID, revision stri
 	err := c.do(ctx, &actions, "GET", "/changes/"+changeID+"/revisions/"+revision+"/actions")
 	return actions, err
 }
+
+// RelatedChangeAndCommitInfo contains information about a particular
+// change at a particular commit.
+//
+// See https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#related-change-and-commit-info.
+type RelatedChangeAndCommitInfo struct {
+	Project               string     `json:"project"`
+	ChangeID              string     `json:"change_id"`
+	ChangeNumber          int32      `json:"_change_number"`
+	Commit                CommitInfo `json:"commit"`
+	Status                string     `json:"status"`
+	RevisionNumber        int32      `json:"_revision_number"`
+	CurrentRevisionNumber int32      `json:"_current_revision_number"`
+}
+
+// RelatedChangesInfo contains information about a set of related changes.
+//
+// See https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#related-changes-info.
+type RelatedChangesInfo struct {
+	Changes []RelatedChangeAndCommitInfo `json:"changes"`
+}
+
+// GetRelatedChanges retrieves information about a set of related changes.
+func (c *Client) GetRelatedChanges(ctx context.Context, changeID, revision string) (*RelatedChangesInfo, error) {
+	var changes *RelatedChangesInfo
+	err := c.do(ctx, &changes, "GET", "/changes/"+changeID+"/revisions/"+revision+"/related")
+	return changes, err
+}